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Nov. 21, 2019 - The Joe Rogan Experience
02:50:54
Joe Rogan Experience #1389 - Chris Kresser Debunks "The Gamechangers" Documentary
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chris kresser
01:54:38
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joe rogan
54:38
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andy stumpf
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jamie vernon
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Speaker Time Text
joe rogan
Ladies and gentlemen, Chris Kresser.
chris kresser
Joe, good to be back.
joe rogan
How are you, buddy?
Good to see you.
We are here because of the film The Game Changers.
I watched it.
I watched it today.
I watched the whole thing from start to finish.
And I have to say, before we even start, I like the guy who's in it very much.
James Wilkes, a very nice guy.
He's an excellent fighter.
He won the ultimate fighter.
And I don't think he's a bad person.
chris kresser
I've only had a little bit of interaction with him just over the past couple days via email.
He seems like a really great guy.
joe rogan
Yeah, very good guy.
Genuine.
We're just going to get into it.
Let's do it.
What was your thoughts on the film and what stood out immediately?
chris kresser
Okay, so a little bit of context.
You know, I think this film was the best of all the vegan documentaries that have been made.
I'll just say that up front.
I think it's pretty well done as a film.
joe rogan
Yes.
chris kresser
You know, it's got a big budget, pretty good storyline.
joe rogan
James Cameron, Jackie Chan.
chris kresser
Lots of celebrities.
Arnold Schwarzenegger.
You know, it's good graphics.
Like, it's just a well-made film.
And I think it's...
Especially for someone who doesn't have the background, you know, or science awareness to critique some of the claims, it's going to be really persuasive and compelling.
And I've definitely, you know, whenever a film like this comes out, my email inbox just blows up.
Like, have you seen this film?
Oh my God, you know, like, I'm eating meat, I'm going to kill myself.
It's just like...
joe rogan
It's the same as cigarettes.
chris kresser
Right.
And, you know, I was talking to Jamie about it before we started recording.
Like, I could set my watch to it every year.
If something like this happens and I've got to do a response, I consider it part of my...
It's part of my public service.
joe rogan
Do you think that they're making these films because they believe what they're saying...
Or do you think they're making these films because they are trying to convert people to being vegan and they think that distorting reality and just bending things and cherry picking data is acceptable because the long run, the benefits of getting the world to shift over to a vegan diet, it's worth not being completely objective or honest about the actual facts.
chris kresser
No, I think they believe it.
I think people like, I mean, James, for example, I think he's genuinely trying to help people.
I think he's looked at the data and he just came to a different conclusion than somebody like me has.
And, you know, I mean, this is, there's something called confirmation bias.
I'm sure many of your guests have talked about, but it's a basic human tendency where we tend to only look at the data that support our point of view and discount the rest of it.
unidentified
Right.
chris kresser
And it's, you know, even really, really good scientists have a hard time overcoming that.
Everybody is guilty of it to some degree, including me.
But I think, yeah, so I think generally the people who are making these films really believe in it.
They believe in the power of a vegan diet, you know, from a nutrition perspective, and they also believe that it's going to help save the world.
joe rogan
The beginning of it I thought was so strange when James talked about being injured and doing all the research he did, which seems like an extraordinary amount of, what do you say, like a thousand hours of research?
And that the thing that stood out was that the Roman gladiators, at least in this one particular location, According to the analysis of their bones, it appears that they had a vegetarian diet, that they ate a lot of grain.
chris kresser
That was strange, too.
I mean, first of all, gladiators were basically prisoners of war criminals, so the diet they're being fed is not— Prison food.
joe rogan
Yeah, it's prison food.
They're slaves that are forced to fight to the death.
chris kresser
They had a life expectancy of about two years once they became a gladiator.
It's interesting they featured Fabian Kanz, who is a scientist, you remember, who they talked to and definitely seemed to kind of buy into the plant-based diet idea or the idea that they were vegetarian, you know, by design or by choice.
They didn't talk to his collaborator, Carl Grossman, who's been quoted in the media saying, here's a quote, And by the way, all of the references, full bibliography, show notes, everything are at kresser.co slash gamechangers because I want this to be totally evidence-based.
People can check what I'm saying right there.
So he said, the vegetarian diet had nothing to do with poverty or animal rights.
Gladiators, it seems, were fat.
Consuming a lot of simple carbohydrates such as barley and legumes like beans was designed for survival in the arena.
Packing in the carbs also packed on the pounds.
Gladiators needed subcutaneous fat, a fat cushion, protects you from cut wounds and shields nerves and blood vessels in a fight.
So they were basically fattening them up so they could survive longer in the arena.
It's not an ideal diet for fighting and muscle protein synthesis and nutrition.
It was basically to fatten them up so they could survive longer.
joe rogan
This seems so obvious that I couldn't believe it was actually in the film.
And it seemed...
It just seemed blatantly deceptive because everyone knows what their life was.
It's not like these were these elite athletes that were competing in the Olympic Games.
These were people that they were sending out to die for other people's enjoyment.
chris kresser
Right.
And the name, my Latin's terrible, I think it was hordiari or something.
It means like barley eater.
It was an epithet.
It was an insult.
It wasn't, you know, a compliment.
It was like, ha ha, you only can afford to eat barley.
So yeah, it was a bizarre way to start the film, I thought.
There could have been better ways to do it.
And let me also just say, like...
If the purpose of this film was to say, it's possible to thrive on a plant-based diet, and look, here are some athletes that have done that, I wouldn't have had any qualms with it.
Clearly there are examples of people who thrive on a plant-based diet.
joe rogan
If all the diet correctly can be done.
chris kresser
Rich Roll, we talked about last time.
Scott Jurek, who's one of the athletes in the film, seemed to do well.
Dottie Bausch, who's one of the athletes in the film.
If you really plan it well and you understand what you're doing and you're on it, it's totally possible.
No dispute with that.
But where I take issue with it is it went a step further and said this is the optimal plan.
Diet for athletes and everybody else, which, you know, even though it was a film ostensibly about athletes, it definitely crossed the line into this is the approach that everybody should do.
joe rogan
Yeah, I mean, they made these claims like all of a sudden people got stronger and faster and more endurance.
Like there's no evidence to support that.
There's no evidence other than their anecdotal statements of what they did.
There's no one has ever put anyone on a vegan diet and then run them through extreme endurance tests and found the significant increase in VO2 max or muscle strength or any of those things.
None of this has ever been done.
So, if it's true, anecdotally, for these people, it would have been really interesting if there was some actual data to go with that, where they showed studies.
I mean, we have James talking about his ability to do the battle ropes, that all of a sudden he could do an hour, and before he could only do 10 minutes.
Well, I find that really hard to believe, that you gained 50 minutes of your battle rope time just from ropes, and that was the only thing in the film that I found hard to believe.
You know, I'd have to let it go.
I mean, the guy's an athlete.
He's an amazing athlete.
He was a great fighter.
He's got fantastic endurance.
He has excellent martial arts technique.
I would just buy it at face value.
But there's a lot of those.
chris kresser
There's a lot.
I mean, we can go through it and talk.
I mean, there's that problem, which is there's no peer-reviewed evidence to back that up.
But even the anecdotal evidence is a little shaky when we start to talk about some of the athletes in the film and then also examples of athletes outside of the film who switched to a vegan diet and we look and see what happened to them after they did that.
The problem here is something that I call the vegan honeymoon, which is, you know, you take someone who's been on a standard American diet, they're eating KFC, McDonald's, etc., and they switch from that to a plant-based diet.
Well, of course they're going to feel better.
They've gone from eating absolute crap to real foods.
And so for a period of time, they're going to feel better for sure.
But then what happens over a longer period of time?
You know, not getting enough protein just in terms of quantity and not getting the right quality of protein, that starts to have an impact.
Micronutrient deficiencies, you know, vitamin A, zinc, calcium, iron, things like that take a while to develop.
So you're not going to see that deficiency.
Decline in performance happen right away.
It might take three months, it might take six months, it might take nine months.
It depends on all kinds of factors.
Genetics, health status going into it, the type of exercise and activity that they're doing, the way they're implementing the diet, etc.
So you have to not just look at what happens a month after someone goes vegan.
You have to look at what happens six months, a year after, or two years after.
And we can look at specific examples of that.
joe rogan
So in the absence of Oh, boy.
Well, the problem is the amino acid profile of that steak is far superior.
The amount of protein that your body absorbs is far superior.
You're talking about a completely different thing.
This is known science.
You can get as many amino acids from plant-based proteins, but you need to eat a higher quantity.
chris kresser
Yeah.
joe rogan
Right?
That's what's important.
It's not the overall grams of protein.
It's the quality of the protein, what's the amino acid profile of the protein, and how does your body absorb it.
Again, this does not mean, like I'm a giant fan of hemp protein.
I eat that stuff all the time.
It's great.
So it's just you can't say that protein grams are equal to protein grams because they're not.
chris kresser
No, but it's even worse than that.
Jamie, pull up slide four if you can.
I made some graphics here because it's sometimes easier to understand when you're looking at a picture.
For the peanut butter sandwich thing, it was like there's the same amount of protein in a peanut butter sandwich as there is in three ounces of beef.
So I looked up the data, of course.
So three ounces of 90% lean ground beef has 24 grams of protein.
You get two slices of wheat bread.
We'll give them the benefit of the doubt that it's whole wheat and not white bread.
That's five grams.
unidentified
Okay.
chris kresser
One tablespoon of peanut butter is four grams.
So you'd have to have five tablespoons of peanut butter in that sandwich to equal three ounces of beef.
That's a third of a cup of peanut butter.
joe rogan
That's a lot of fucking peanut butter.
chris kresser
You ever made a peanut butter sandwich with a third cup of peanut butter?
joe rogan
I probably have, but I'm a glutton.
I'm a legit glutton.
I've probably done that many times.
chris kresser
And that's 600 calories versus 200 calories from the ground beef.
joe rogan
Just for the same amount of protein.
chris kresser
Just quantity.
We're not even getting into quality yet.
I'm going to get into that in a second.
But we're just talking about quantity of protein.
joe rogan
But I think they were saying peanut butter sandwich and a cup of lentils, right?
Wasn't it the combined...
chris kresser
No, I think they said three or a cup of lentils.
joe rogan
Was it an or?
chris kresser
Yeah.
joe rogan
But the reality is it would probably be wood plus a cup of lentils.
chris kresser
Yeah.
Then, as you pointed out, it's all about protein quality.
And as you said, this is an established science, firmly established science.
They look at this especially like in third world countries where protein deficiency is common.
So they try to figure out...
How to address that?
What are the highest quality proteins that we can feed these people to bring them up to where they should be in terms of protein intake?
So the most recent scale that's used is called the DEIS, Digestible Indispensable Amino Acid Score.
So it ranks proteins according to two main categories.
One is the amino acid profile.
And as you mentioned, When it comes to protein quality, it's not just does the protein have every amino acid.
You know, this is what's a little disingenuous about the film.
They said every plant protein has every amino acid.
Well, yeah, nobody disagrees with that, but does it have enough of each of them?
That's the key question.
What's the quantity?
joe rogan
What's the profile?
chris kresser
So, the DS looks at amino acid profile, but then it also looks at bioavailability.
A protein is not worth much if you can't actually digest and absorb it.
So, it's a complex, you know, algorithm that combines all those things and that ranks the proteins on a scale.
So the DS for beef, rare beef, is 1.39.
It's among the highest scores on the whole scale.
The DS for egg is 1.13.
For peanut butter, it's 0.45, and for wheat, it's 0.2.
Those are among the lowest proteins that have been measured on the scale.
So even if the quantity was the same, the effect on your body, particularly on things like muscle protein synthesis, which is of concern for athletes, is not even in the same ballpark.
joe rogan
And when they're talking about the USRDA, they're talking about like how much...
The United States' recommended daily allowances.
Isn't that just to be healthy?
chris kresser
Not even healthy.
To be alive is more accurate.
It's the amount that's required to avoid malnutrition, technically.
joe rogan
I know that.
Why don't they know that?
I'm not doing any documentaries on food.
Why don't they know?
chris kresser
like so to use that as a reference point to use that as like look you can get this that's plenty that's crazy well that's a common argument in the vegan community and they you know i don't know whether it's because they they really don't understand the science behind it or because they do and they're just you know it's being kind of exaggerated to suit the their claim i can't know This is what I think it is, honestly.
joe rogan
There's a lot of vegan influencers, and there's a lot of people that make YouTube videos, and people who produce things like this.
And then the other folks just parrot what they say.
So instead of reading the actual studies and talking to objective Right.
then the actual film itself that's just how it goes nobody's gonna watch and so especially the people that already convinced for them it's like excellent I knew Jesus was real now I've got the proof you know I mean it's really like that it becomes The ideology becomes so strong, it becomes like a religion.
And look, I've been accused of it from doing it from a meat perspective.
And I understand.
I understand that you would think that if you had an opposing vegan or vegetarian perspective.
I totally understand.
But man...
You know, we saw it with the Joel Kahn discussion, and you see it almost every time someone who's actually informed has a conversation with one of these influencers.
Like, they're not being 100% accurate, objective, or even honest in a lot of cases.
chris kresser
Yeah, I mean, there's a great Leon Festinger quote, I don't know if you've heard it.
A man with a conviction is a hard man to change.
Tell him you disagree and he turns away.
Show him the facts and figures and he questions your sources.
Appeal to logic and he fails to see your point.
joe rogan
The best argument, in my opinion, is this factory farming is disgusting, and that the cruelty of treating animals like a commodity and serving them up for slaughter in these horrific conditions, these factory farming conditions, and these horrible pens that we've all seen.
That's the argument for veganism.
chris kresser
I agree.
joe rogan
But when we're talking about performance and health, this is where it just gets very frustrating for me.
Because if you want to make an argument that you should probably...
Follow a more complicated diet.
More complicated meaning that it's more difficult for you to acquire in some cities.
You have to be a little bit more careful about getting supplementation with vitamin B12 and essential amino acids.
You've got to be a little bit more careful.
If you want to maintain a healthy, robust life, it's possible to do that.
But it's a little more complicated.
And if you want to say, I want to live like that because the way I feel about eating animals makes me feel terrible.
I don't want to have any part of that.
And I found out that I can not have a part of that and I can live my life.
That's great.
But that's not what they're saying.
chris kresser
No.
And there's a lot of problems with that argument, too.
I want to come back and spend some time on that.
joe rogan
We can do it right now before we move on, because we just covered it.
chris kresser
All right.
So I want to go back to the RDA. I don't want to forget that, because that's super important.
Yes.
Yeah, so where to start with that?
So first of all, you know, the idea that plant-based agriculture doesn't kill animals is just false.
I mean, there have been studies that show that particularly monocropping type of plant agriculture kills animals.
Far more animals than are killed from eating cows, for example.
Insects, rodents, mice, birds, fish, all killed in the process of industrial agriculture.
And so that presents an ethical dilemma, really.
If you are saying, I'm a vegan because I don't want my food choices to involve killing animals, is killing a whole bunch of small animals Is non-mammal animals better than killing mammals?
Or what about killing more small animals than one cow?
Does size matter?
Where do you draw the line between an animal that is sentient enough or cute enough maybe to not be killed versus...
joe rogan
Let me clarify what you're saying, too.
You're saying more animals per meal.
So if you want to have a meal out of wheat, most likely more animals are going to die.
It's like if you have a hundred wheat meals with wheat in them, you're probably killing more animals than if you have a hundred meals with cows in them, because that's like a cow.
chris kresser
Yeah, I don't know the answer to that question.
I'm comparing kind of the whole process, you know, like eating animals versus eating plants.
And I don't know if that per meal comparison has ever been done, but I'm just saying that that's an interesting ethical question.
joe rogan
Let me give you their argument for that.
They say that most of these monocrops are to feed animals.
chris kresser
Yeah, that is a problem.
I mean, where I agree with this film is that conventional livestock practices are harmful to the planet.
joe rogan
Right, but what they're saying is that you're saying that eating a vegan diet and all these monocrops, that these monocrops are killing all these small animals.
They're saying, no, these monocrops, most of them actually exist to feed livestock.
chris kresser
That's...
That's not true.
If you follow this through, especially when you start talking about fake meat, what are those based on?
Soils.
They're industrial crops.
They're not grown on the family farm.
These are industrial GMO monocrops on a massive scale.
There was a great study published in the journal PNAS in 2017, and it was specifically addressing this claim of would removing animal products from our diet have, you know, saved the world?
Basically, would it reduce greenhouse gases?
Would it improve our nutrition?
Basically, they found that it would only reduce greenhouse gas emissions by 2.6%, but our intake of carbohydrates, total calories, would go way up, and the incidence of nutrient deficiencies would go way up.
And they did the math and found that without animal products, domestic supplies of calcium, EPA, and DHA, which are the long-chain omega-3 fats, retinol, and B12 were, quote, Insufficient to meet the requirements of the U.S. population.
So translation, everybody would have to be supplementing with those nutrients if everyone went on a vegan diet.
And they went on to say that basically there's already a surplus of calories in the diet of 145%.
If we removed animal products entirely, that would go up to 230%.
So, because the volume of calories in food that would be required to meet basic nutrient and protein needs would be that much higher.
So, you know, there's a lot of downstream consequences that I don't think have been fully thought through, even if a plant-based diet might work for one person.
Will it scale?
If you take that to the full level of everyone eating a plant-based diet, which is the argument that is being made, does it really work from a nutritional perspective, from an environmental perspective, and even from an ethical perspective?
joe rogan
The environmental perspective is legitimate.
They both cause environmental damage, both animal agriculture and plant agriculture.
chris kresser
Industrial practices cause environmental damage.
joe rogan
And if you want to feed 320 million people, you're not going to do it through organic farms.
You can grow food in your neighborhood.
If you live in a small town, you guys can have a co-op.
You can have food in your backyard that you can grow.
But if you're living in a city like Los Angeles, it's highly likely your food is not coming from that city itself.
So that means it has to be grown.
And if you're going to grow food for 20 million people, you need a giant chunk of land.
If you need that giant chunk of land, even if everybody's eating vegan, that means wildlife is going to be displaced.
The area where you're growing crops, it's going to be a monocrop culture.
You're not going to have all these plants living together like they do in the wild.
That's just not how you grow food for 20 million people in a very specific area.
You just don't do that.
chris kresser
Yeah, I know you had Joel Salatin on the show a while back, and Alan Savory talked a lot about this.
One of the biggest issues right now is soil.
Soil erosion.
Soil is eroding.
The FAO has said we only have about 60 harvests left if soil continues to degrade at the rate that it's going.
And so one of the arguments for regenerative, holistically managed livestock is that that can actually help regenerate healthy soils.
And some, like Joel Salatin or Alan Sabry, would argue that that's the only way we're going to be able to feed the world because only about 60% of available land is not suitable for cropping.
Even if we decided, hey, let's just plant soy and corn and, you know, plant plants everywhere.
We couldn't because it's too rocky or hilly or the soil is not adequate to do that.
But it could be used for livestock.
joe rogan
There's a thing that they keep saying that you brought up slightly.
You touched on it a little bit earlier.
The thing is that greenhouse gases and they were talking about the greenhouse gases from meat.
And it's just a fake number.
I mean, it's over the top not true.
The specific number is 9% for all agriculture, all agriculture, including growing crops.
The vast majority of all of our greenhouse gas issues are coming from transportation and from industry.
This is undisputable.
chris kresser
So this is where I wonder, too, about whether it's...
Is this disingenuous?
Are they not aware of what's happening here, or is it disingenuous?
So here's the thing.
Here's what they did, Joe.
So the specific number in the film, they say greenhouse gas emissions from cattle are 15%, and they compared that to 14% for all of transportation.
But the problem with that is that they're using the full life cycle analysis for livestock.
So that means the carbon needed for feed, for transport, for processing the cattle, not just emissions, not just methane burps from the cattle.
Whereas for transportation, they're only looking at what are called direct tailpipe emissions, just the emissions that come out of the tailpipe.
They're not looking at the carbon needed to manufacture the vehicle, the cars, the buses, the airplanes, the inputs for making the fuel, the fuel production and distribution, the final use of the fuel.
That life cycle analysis for transportation hasn't been done just because it's enormously complex and it would be a phenomenally big number.
The EPA has estimated that something around 80% of the greenhouse gas emissions comes from industry, basically fossil fuel.
So it's not an apples to apples comparison.
They're doing the full life cycle for livestock versus just the direct emissions for transportation.
Well, if we look at just the direct for both...
It's 5% for livestock globally and 14% for transportation.
But in the U.S., it's only 3.9% for livestock because we have more efficient practices here versus 14% for transportation.
So not even in the same ballpark.
And it's just, yeah, I mean, they can just say that in a film.
Most people will hear that and nod their head because they've heard those numbers before.
But the devil is always in the details.
joe rogan
What's going on is what you see in a lot of these videos where only one person gets to talk.
One person who has a specific agenda gets to cherry pick the data and distort it and then put it on the film.
And you can accuse us of doing that right now because both of us are clearly on the same page.
And I would be happy to have James come in with you afterwards.
We did it with Joel.
James is way more reasonable than Joel and not slimy.
So I'd be happy to do that.
And I think that when it's all said and done, I would just like people to be informed.
And everyone is going to have their own ideological bias.
Everyone's going to have their own preference.
But to make poorly informed decisions, or that's being kind.
To be more blunt, deceptive, Information, forming your decisions, and having health consequences because of that, to me, pisses me off and freaks me out.
The health aspects are not being represented accurately.
chris kresser
Yeah, it particularly bothers me when kids are involved.
joe rogan
There was a case recently where I was going to tweet it, but I was like, God damn it, I can't even tweet it.
It's so sad, where a child had died from malnutrition because the parents were feeding it a vegan diet, and all the other kids looked like they were starving to death, too.
And then the social workers came in, and it's a goddamn nightmare.
I mean, if you hear about that from people that are starving their kids on a regular diet, they're just either extremely poor or they're monsters, and they're treating their kid terribly.
These people don't seem like they're bad people.
chris kresser
No, they believe in what they're doing.
They're trying to do the right thing.
joe rogan
That's the scariest part about it.
You're seeing that this diet, again, you can do it correctly, but it's fucking complicated.
chris kresser
It's hard.
Yeah.
Just one more thing on the greenhouse gas question.
All the numbers I just gave you were from conventional methods, you know, like basically CAFO beef.
When they have looked at regenerative, holistically managed livestock, they've found that it can either be carbon neutral or even a carbon sink.
So there's a guy who's written some papers on this, Richard Teague.
And in his 2018 paper, which again you can find on my website, thecressor.co slash gamechangers, he found that these larger, more complex, holistically managed sites can sequester between 3 to 4 and even up to 7 tons of carbon per hectare per year.
So these holistically managed beef operations are actually removing carbon from the atmosphere.
joe rogan
How does that work?
How are they doing that?
chris kresser
This is a little out of my wheelhouse, but it's part of the whole methane cycle, the natural biogenic cycle.
And this is important to understand, the difference between transportation, which is basically taking out fossil fuels that have not been part of that natural cycle for millions of years and then just emitting them into the atmosphere, With the carbon, the biogenic carbon cycle, you have methane, you know, cows are burping out methane.
Methane goes up into the atmosphere, and then via hydroxyl oxidation, it's converted into CO2 and water vapor.
Then the plants take in CO2, and then via photosynthesis, they convert it into food, basically.
And then the cows eat the food, and the whole cycle keeps going.
joe rogan
And this is a natural cycle?
chris kresser
This is not something you have to use equipment to achieve this?
joe rogan
So it just has to be a certain amount of plant life in their area?
chris kresser
So the way that...
I mean, like Joel Salatin, for example, from Polyface Farms and Savory Institute, they basically educate farmers on how to rotate their livestock.
Again, this is not my area of expertise, but rather than just having the cattle...
Stay in the same place the whole time, like in a feedlot.
They're moving the cattle around, the cattle are pooping, then they bring the chickens to where that was, you know, where the cattle were, and they move it around in a way, again, that I don't fully understand, but the effect of this is that the amount of carbon that is sequestered from the atmosphere is greater than the amount of CO2 that is emitted.
And these life cycle analyses have been done and published in the literature.
It's true that right now that type of holistically managed livestock is not very common, but that doesn't mean that it's not what we should be doing.
This is the thing.
With the film, I agree with the problem, the premise, which is that the feedlot beef production is a nightmare.
It can be bad for the environment, and we have to do something about it.
Where we disagree is what the solution is.
They go to a plant-based diet or fake meat or lab meat.
I go to regenerative, holistically managed livestock.
joe rogan
Okay.
So, this animal, the regenerative livestock production, doing it in this method, is that sufficient to feed everyone?
The production?
I mean, how much land do you need to do something like this?
chris kresser
So, I knew you were going to ask that question, and I talked to Savory Institute about this, and a few other people, and basically...
One response is it's the only way we're going to feed everybody because, as I mentioned, there are only 60 harvests left because of soil degradation.
So continually trying to scale up industrial plant agriculture with soy and corn and all of these kinds of crops is going to further degrade the soil.
And at some point, we're not going to have any soil left.
joe rogan
That's an important factor, right?
We should talk about this, that you need compost, and you need fertilizer, and you need something that replenishes the soil.
And doing these large-scale monoculture crops, when you have these enormous areas, they're just depleting, right?
They're just pulling, and then they have to add.
chris kresser
You can't make something from nothing.
That's the thing.
We're not choosing between, like, you know...
One really good alternative and one terrible alternative.
That's not a choice, like you were saying before the show.
That's not even a choice.
You just obviously do the right thing.
We're choosing...
It's like, on the one hand, if we try to scale up plant agriculture in an environment where, according to the FAO, our soils are in only, quote, fair, poor, or very poor condition, and we only have 60 harvests left due to rapidly deteriorating...
Soil due to erosion and nutrient depletion, then we desperately need new methods of restoring healthy soil.
And if we can do that with regenerative, holistically managed livestock, which has been shown in the scientific literature to be possible, then that may be the only way we can feed everybody.
joe rogan
So we would need to almost have a reversal, if that was the case, and have more animal agriculture than plant agriculture.
chris kresser
But not the way it's being done now.
joe rogan
Right.
So they would have to be like Joel Salatin set up.
chris kresser
Yeah, so we need three things to happen.
One would be we need to return all the croplands that are being used to feed livestock and feedlots right now to grassland.
And number two, we need to put all unused land like the rocky, hilly soil or land that can't be used for plant agriculture into production with animals.
And number three, farmers and ranchers would need to adopt regenerative practices, you know.
So I'm not saying – this is an enormous undertaking.
We're not – we're talking – but so is feeding the world with plant-based agriculture.
unidentified
Right.
chris kresser
Whichever direction we go, we're talking about really systemic change that needs to happen in a big way.
joe rogan
And this would have – you'd have to have all of the meat be grass-fed meat because they would be eating what they naturally eat.
Now, what is the percentage of grass-fed meat in this country currently?
chris kresser
I don't know for sure.
I think the number I read was something like 2 or 3%, so very low.
joe rogan
Very small.
chris kresser
Yeah.
joe rogan
That makes sense.
Many, many people prefer grain-fed meat.
They like it fatty and sloppy.
I mean, that's what it is, right?
chris kresser
A lot of people like that.
Well, what's interesting, and I didn't even know this until a few years ago, even feedlot meat is mostly grass-fed.
It's just what happens in the last 5 or 10% of the process.
So it's like 90% grass-fed and then it's grain-finished.
And that grain-finishing gives it the marbling that is what you're talking about.
joe rogan
It makes the animal sick.
chris kresser
Yeah.
joe rogan
I mean, they're not supposed to eat that.
Really, that's what it is.
And we've gotten addicted to animals eating things they're not supposed to eat and the way their flesh comes out.
chris kresser
Yeah, I mean, a lot of that is they're eating things like soy cakes, which is a byproduct of soybean oil production.
Soybean oil consumption has grown like a thousandfold in the past 120 years.
It's now the...
The number one edible oil that we eat.
Because if you go into the supermarket and you look at any food label, it's soybean oil, soybean oil, soybean oil.
So the oil is valuable.
And then they take the cakes that are left over from the oil production process and feed them to cows.
And so, yeah, they're eating stuff that they wouldn't normally have eaten in that scenario.
joe rogan
Yeah.
So both scenarios, as you said, are almost insane.
Feeding everyone.
And then also, like, what do we do with the animals?
If we're going to stop eating meat, like let's say if this entire country stops eating meat, what do we do with the animals?
We give them birth control?
Make them die of old age?
Do they go extinct?
If they don't go extinct, who houses them?
Who feeds them?
What do we do with them?
We never eat them?
How do we kill all the wild pigs?
chris kresser
I mean, another question is what do we do with the feed, the things that we're feeding the animals?
If that stuff decomposes, it releases carbon into the atmosphere as well.
But at least when you feed it to animals, you're taking food that is inedible to humans, like I'm not going to eat soy cakes.
I think you are.
Grass, fobs, corn stalks, leftover grains after you make whiskey and other types of alcohol.
You feed those to cattle.
They upcycle that into highly nutrient-dense and bioavailable protein.
What James said a number of times in the film was cattle or animals are just the middleman.
I'm like, exactly.
Exactly.
They're really amazing middlemen.
They take food that is inedible to humans and turn it into super nutrient-dense food that we can digest and absorb.
I mean, thank you.
joe rogan
Yeah, this – I mean, it's just – it's so confusing when a film like this gets made because so many people get up in arms and so many people get influenced by it and so many people think that this is the way to go.
My take on a lot of this is there's a lot of people that have kind of fashioned their careers out of this ideology, whether they believe it or not.
chris kresser
The thing is, like, we can go down that road of, we can say, okay, so this film was made by James.
You know, James Cameron was one of the filmmakers.
He also is the owner of Verdient Foods, which is a pea protein company.
And he said he has the goal of it becoming the biggest organic pea protein company in the world.
He's invested $140 million into it.
His wife, Susie Cameron, is finding a chain of vegan schools.
So, you know, from one perspective, that's conflict of interest.
You know, this is an agenda-driven film.
It's not a dispassionate, objective look, you know, scientific look at the vegan diet.
But, you know, I mean...
You can make that argument about just about anyone at this point.
Is it that surprising that a vegan film has a bunch of vegan medical experts in it?
Is it surprising that those experts invest in what they believe in and that they write books about it?
I don't think so.
But it's important to know that and to not confuse a film like that with a scientific work.
And that's my problem with this is...
What is it?
The American College of Lifestyle Medicine?
I have to look this up.
One of these organizations is offering CEUs to doctors who watch this film and complete a quiz.
That's absolutely ridiculous.
This is not peer-reviewed science.
This is not...
Something that doctors should be getting CEUs for.
What is a CEU? Continuing education units.
So basically, doctors have to do, any medical professional has to do a certain amount of continuing education.
Generally, you go to an accredited seminar or class or whatever, and that's how you do it.
But they're actually offering those for doctors who watch this film and complete a short quiz.
Wow.
Yeah, that's freaky.
So I don't know if we talked about this on the con show or one of the previous ones.
Yeah, it was American College of Lifestyle Medicine.
Well, they were founded by Seventh-day Adventists at Loma Linda University.
The Seventh-day Adventist Church, do you know about this?
joe rogan
They're vegetarians.
chris kresser
Yeah, so one of the founders was Ellen White, and she taught that meat was a toxic substance and that flesh should be avoided because it increases our carnal urges.
joe rogan
Holla!
chris kresser
It was a moral religious thing at first.
And then one of the other, an early Adventist church member, Lena Cooper, she co-founded the American Dietetic Association, which is still to this day one of our major dietetics organizations.
And she wrote textbooks that were used in dietetic and nursing programs all around the world for 30 years.
years.
So we have this weird meshing that goes back to like the early 20th century between religion and science.
joe rogan
Do the seven day Adventists have better health overall in general?
They do.
chris kresser
But the argument is often made that that's related to diet.
Well, it could be that it's related to, you know, part of their creed is to eat healthy whole foods, but they also don't smoke, they don't drink, they're advised to exercise.
So, it's kind of like the Dean Ornish studies where, you know, you put together all these interventions, one of which is a low-fat diet, and then you say that the benefit was because of the low-fat diet.
joe rogan
What you're referring to is the study that showed that, and this is what vegans like to say, that vegan diet is, and Joel loves to use this one, a vegan diet is the only diet that's ever been shown in a study to reverse heart disease.
But what this study actually shows is these people had terrible diets, they smoked and they drank, and then they put them on a vegan diet, no smoking, no drinking, and exercise, and what do you know?
Their health improved.
But it's not like we have a corresponding diet where they did the exact same thing and gave them an omnivorous diet with like grass-fed bison meat and then showed a similar set of tests and showed a decline or showed a better performance by the vegan diet.
You have all of these factors that are compiled together.
Quitting drinking, quitting smoking, quit eating shit food, eating a vegan diet, And exercise.
chris kresser
And stress reduction and community support, all of which we know have an impact on heart disease.
joe rogan
That is the study.
So when they say that a vegan diet is the only diet that's ever been shown to clinically reduce heart disease, that's not really true.
chris kresser
It's disingenuous.
And the other thing about that study is that the baseline characteristics of the control group versus the experimental group were totally different.
Experimental group weighed 34 pounds more than the control group.
So they were more overweight.
They had more weight to lose.
They were less healthy.
I mean, that study would be thrown out today.
joe rogan
What year was the study from?
chris kresser
This was 1998. Yeah, well, this is the problem when conversing with Joel about this.
joe rogan
And by the way, the reason why I had him on, and I know people think I'm biased, and I am.
I'm biased.
My perspective is that you're correct, and that all these other Marxists and Rob Wolf and all these other folks, I think they're correct.
An omnivorous diet is the way to go.
But I had him on to try to pursue this path of objectivity, to try to give him an opportunity to express what's incorrect about what you're saying, and it didn't work out for him.
I mean, by everybody's account that I saw that he lost that debate.
chris kresser
So, I mean, you brought up a point which I think is the crux of this whole thing, which is context is everything.
And the problem with a lot of the research on plant-based diets and, you know, low-fat diets and all this is they make the implicit assumption that a diet that includes meat that is like where the context is KFC, McDonald's, you know, cheese doodles, Coca-Cola, the whole standard American diet is the same as a diet that includes meat that's completely whole foods based, you know, like the way you eat, the way I eat, you know.
Lots of vegetables, fresh nuts, seeds, starchy tubers, whatever.
If you ask 100 people on the street, my guess is 100% would say those are obviously different.
But the way that research treats them is they're the same.
joe rogan
Exactly the same.
Because the correlating factor, the main factor is meat.
chris kresser
Yeah.
They don't control for any of those other things.
joe rogan
It's ridiculous.
chris kresser
Now...
That's changing.
So there have been studies that have been done over the past few years that are looking more at diet quality rather than just the quantity of specific food ingredients or foods like meat.
And what those studies are universally saying is that quality is what makes the difference.
So, a great example, we talked about this with Joel, are the studies on looking at omnivorous versus vegetarian and vegan diets and lifespan.
But instead of just looking at the general population that eats meat, they tried to find ways to, like, at least...
a slightly healthier omnivorous population.
So there was one, the health food shoppers study, where they only looked at people who shopped at health food stores thinking, okay, these people are at least thinking about it a little bit.
It's still not controlling for all the factors, but they're saying, let's look at people who shop at a place like Whole Foods, and then let's compare lifespan between vegetarians and vegans and omnivores.
Well, guess what?
Both groups live a lot longer than the general population, but there was no difference in lifespan between people who ate meat and vegetarians and vegans.
joe rogan
The premise is that meat is poison.
And so when you add meat to these studies, that people with meat...
Well, they're eating poison.
And the people without meat, look, no poison.
andy stumpf
But what about all the other shit?
This is what's so crazy about it.
joe rogan
How can you have a study where you don't take into account how many people drink or smoke?
And you just add the meat.
It's insanity.
chris kresser
That's the healthy user bias.
This is the problem and what makes my job so difficult is people have heard that meat is bad for 50, what, 60 years, you know?
So someone can say meat is bad.
That's three words.
And for me to unpack that, I have to talk about healthy user bias.
I have to talk about problems with data collection and food frequency questionnaires.
I have to talk about relative versus absolute risk.
You know, I mean, people are just like, what?
joe rogan
Well, that's the problem with any of this data.
It's one of the beautiful things about being able to talk about it on a podcast with a moron like me is at least you're getting a conversation where people are going to ask questions like, what the fuck is he saying?
So I get to ask you that and then people get to hear it.
You know, this is a very strange time when it comes to information, because so much of it is available, but almost too much.
And then when you realize, when you start trying to study nutrition, there is so much to learn.
There's so many factors, and there's so many biases.
chris kresser
I listened to your interview with Matt Tybee and the point, I was thinking about it because you were talking about it politically, how we're just living in echo chambers now.
So you go on social media, you're Republican, you're only going to see stuff that caters to your view.
And the algorithms are even optimized for that because they know that you'll click on that more and that will lead to more ad dollars.
But it's similar with nutrition.
So, you know, if you're vegan, you go on YouTube, you're going to see a ton of vegan videos and vegan perspectives.
Same with your Facebook feed, etc.
And to be fair, it's the same for, you know, people who are into keto or low-carb or carnivore or whatever they're into.
It's the same thing.
So you're just getting this reinforcing...
Confirmation bias, you know, supporting access to information.
joe rogan
That is a weird thing about social media algorithms, whether it's YouTube algorithms or Facebook or any of these things, is that they're giving you what you want to see, which you would say, oh great, well that's what I want to see.
There's so many counter-arguments, especially when you're talking about nutrition science.
There's so many discussions on both sides of the fence, and it seems like both sides are preaching to the choir.
chris kresser
Yeah.
Well, you know, I mean, we're biased, as you said.
My story, as a lot of people know, is I was vegan.
joe rogan
Somebody said on one of the videos, you are the most vegan-sounding non-vegan ever.
unidentified
Yeah.
chris kresser
Well, I mean, yeah.
I was a vegan.
I was vegetarian.
I was a raw food vegan.
I was a macrobiotic vegan.
I have a lot of friends who are vegan.
I have patients that are vegan.
I have nothing against vegans.
And I totally get the reasons that people become vegan.
But I, like many others and my patients and my community, my health was harmed by that.
How was your health harmed?
joe rogan
Can you explain to people?
chris kresser
Yeah, I mean, I lost weight, and as you can see, I don't have a lot to lose to begin with.
My digestion got really screwed up.
I got depressed.
I'd never been depressed.
Like, I've never been a person who gets depressed.
I felt anxious.
You know, it just was clearly not working for me.
And again, that's not to say it can't work for some people.
joe rogan
Do you think the cause of depression had something to do with the diet because of the lack of cholesterol?
B12. Hormones.
chris kresser
Iron.
Yeah, for sure.
But, you know, now, like, I mean, it's funny, too.
I don't actually, I make a point of not reading comments, usually.
joe rogan
Yeah.
chris kresser
But occasionally I come across them on Twitter or something.
joe rogan
No, this is something a comedian told me.
So that's why I thought it was hilarious.
chris kresser
So, you know, people are like, oh, he's such a, you know, he's going to get on there and just low carb, low carb.
That's total, like, I don't, I'm not a low carb guy.
I never have been.
In fact, I'm in trouble with the low carb community because, you know, I push back.
I don't think it's right for everybody.
joe rogan
I don't think it's right for performance.
I don't see any evidence that for elite athletic performers that it's the way to go.
And I don't know anyone that's an elite athletic performer that follows those diets.
chris kresser
Maybe endurance runners.
joe rogan
I was going to say Zach.
Yeah, I was going to say Zach.
And Zach flies in the face of all this stuff.
And, you know, if you want to include someone like that guy that ran the Appalachian Trail in 48 days or whatever he did, which is no small feat for sure.
But, I mean, Zach Bitter ran...
He ran a 100-mile race in 11 hours and 40 minutes, which is fucking bananas.
chris kresser
And then kept running, I think, after that.
joe rogan
He's a savage.
He eats ribeyes.
That's what that guy eats.
He talked about it.
The main food in his diet is ribeye steaks.
chris kresser
He's mostly keto.
So, yeah, I mean, anyways, my point was just, like, I'm not super dogmatic.
I'm just, like, I'm interested in what works for the most people, essentially.
And, you know, you mentioned Scott Jurek.
A Belgian dentist shattered his record by five days a couple years ago, and that guy was eating, like, Snickers and tons of crap.
So, I'm not saying that...
joe rogan
He shattered his record by five days?
chris kresser
Yeah.
joe rogan
Oh, Jesus.
chris kresser
I'm not saying that that's what you should...
I'm not saying that's what you should do, but I'm saying there's more to athletic performance than food.
joe rogan
I guess that's not really deceptive, because he did break the record.
When he broke it, he did break it.
chris kresser
Yeah, he broke it.
He's a phenomenal athlete.
I don't want to take that away from him.
And then, like, Michael Phelps, you know?
joe rogan
Guy's Pizza.
chris kresser
Guy eats 12,000 calories of sugar, French toast, pizza.
Usain Bolt in the Beijing Olympics, when he shattered those records, he ate over 1,000 chicken nuggets, I think somebody calculated it.
That's amazing.
There's more to it than diet.
joe rogan
I think when you're at that level of performance, you are burning off such an insane amount of calories.
unidentified
Almost doesn't matter.
joe rogan
You're working so hard.
You can almost eat anything.
chris kresser
When you're in that mode.
joe rogan
Yes.
This is obviously not comparable, but when we did Sober October last year, we had this fitness challenge.
I was doing cardio.
No joke.
Minimum five hours a day, sometimes six and seven.
It was insane.
And I was eating everything.
Boxes of cookies, bottles of soda.
chris kresser
Probably lost weight, too.
joe rogan
Yeah, I did.
Well, not really, because I lifted a lot of weights, too.
I kind of maintained.
Maybe I lost a couple of pounds, but I was drinking, like, giant, like, Cokes.
Like, I was drinking, like, cream soda.
I never drink that shit.
But it's like, my body wanted sugar.
It's like, give me some sugar.
You just did seven hours on a fucking elliptical machine, you asshole.
It was so ridiculous.
But those guys are working out even harder than that.
So imagine what Phelps...
chris kresser
If you need 12,000 calories, you're not getting it with paleo and you're not getting it with vegan diet.
joe rogan
That's important.
chris kresser
That's important.
So let's rewind a little bit to the protein, the RDA. Yes, RDA protein.
That's super important.
So 0.8 grams per kilogram of protein per day is the RDA.
And again, that's just the basic minimum.
That's not the amount that's needed for optimal health and performance.
That's just the absolute basics for avoiding malnutrition.
However, even that number now, that's based on outdated nitrogen balance studies for determining the RDA.
And there's a newer method called the Indicator Amino Acid Oxidation Technique, or IAAO.
And this suggests that the RDA should be 1.2 grams per kilogram of protein.
And again, just the basic minimum, bare minimum, not optimal.
It's now gone up from 0.8 to 1.2.
And if you use that number, if you pull up slide 8, Jamie, that's only enough for an adult that weighs less than 130 pounds.
joe rogan
Really?
chris kresser
So, sorry, you know how he said, and James said in the study, the average vegetarian gets 71 grams a day, which is not only, you know, the RDA, but 70% more.
That's using the 0.8 number.
But if you use 1.2 grams per kilogram per day, then a lot of people are going to be protein deficient on a vegetarian diet.
unidentified
Yeah.
chris kresser
And we're not, again, not talking about optimal amount for athletes.
We're just talking about the RDA basic bare minimum.
joe rogan
And when you say vegetarian, you should say vegan, correct?
Because you're not talking about egg protein.
You can get...
chris kresser
No, this study was vegetarian.
They weren't referring to vegans.
joe rogan
So you actually could get egg protein.
chris kresser
Yeah, and dairy.
joe rogan
Right, but eggs are far superior in terms of their amino acid profile than vegetables.
chris kresser
Yeah, so for vegans it would be different.
joe rogan
I brought up eggs to a friend of mine.
I was saying this really recently, why don't you try eggs?
And they looked at me like I was talking to them about poison.
There's plenty of people that are vegan or vegetarian and you bring up eggs to them and they look at you like, why would I eat an egg?
chris kresser
Yeah, so that's, you know, 1.2 is the RDA, if you use this newer method.
But for athletes, James, to his credit, does acknowledge in the film that athletes need more protein than regular non-athlete people.
But he doesn't say how much more.
So, again, if you use these IAO methods, they've used this newer technique to look at athletes, and they've found that the range is somewhere between 1.4 to 2.7 grams per kilogram.
So, we're now way higher than that 0.8 number.
And just for people who aren't familiar with kilograms, let's say we take the median number there, 2.1 grams per kilogram per day.
Well, anyone who's ever been in the bodybuilding weightlifting community will recognize this.
That's one pound of protein per pound of body weight.
a day Which has been the common recommendation in that community.
joe rogan
You mean one gram of protein?
chris kresser
Sorry, one gram of protein.
joe rogan
Not one pound.
chris kresser
Holy shit.
joe rogan
Can you imagine?
chris kresser
One gram.
And in fact, even Arnold in the movie says, I weighed 250 pounds.
I used to eat 250 grams of protein.
That's the recommendation.
That's the standard in the bodybuilding community.
And it turns out that's actually based on science.
You know, so a 200-pound athlete would need 200 grams of protein a day.
And Jamie, if you pull up slide 10, this is what you'd have to eat on a vegan diet to get that amount of protein.
And again, we're just talking about quantity.
We're not talking about quality.
joe rogan
So 200-pound athlete, that's me.
I weigh 200 pounds.
chris kresser
200-pound athlete, so you would need to eat.
joe rogan
So show me what I'd have to eat.
chris kresser
Three cups of cooked lentils, three cups of chickpeas, two cups of quinoa, three ounces of almonds, three slices of silken tofu, and ten tablespoons of peanut butter.
joe rogan
That's the whole day?
chris kresser
That's the day.
joe rogan
I could fuck that up in a day.
chris kresser
Yeah, you could.
But the problem is the Dia score for all of those, like the bioavailability and the amino acid profile would be horrible compared to meat, eggs, dairy.
unidentified
Yeah.
joe rogan
So what would I have to do?
Because I know they've done this study.
There was a study that I'd read or had heard about, I should say, where they compared rice protein to whey protein, and they found that at a certain level of grams, like whatever it was, they had an equal effect.
Is it lutein?
chris kresser
Leucine.
joe rogan
Leucine.
chris kresser
The muscle protein synthesis.
unidentified
Yes.
joe rogan
They had an equal effect.
I should give credit to the video that I was watching.
This gentleman, I was watching this video today, Dr. Ryan Lowry.
And they were saying that what that means is that Correct me if I'm wrong.
Once you hit a certain level of leucine, it's a point of diminishing returns and there's no added benefit to having more leucine in your diet.
So if you hit whatever it is, I think it was 48 grams or something like that.
When you have 48 grams of this and 48 grams of that, you put the two of them together, it's essentially the same effect.
chris kresser
Well, I'm not sure about that, but I mean, leucine is very important for anabolic signaling and muscle protein synthesis.
It's the essential amino acid that's thought to be the most important for that, and it's low in plant proteins.
And the other issue with plant proteins that you have is that they have limiting amino acids.
So these are amino acids that actually interfere with muscle protein synthesis.
Because the levels are so low in that food.
So lysine is a limiting amino acid in grains like wheat and rice.
Maybe there was leucine and lysine discussion maybe there.
And then methionine and cysteine are limiting in legumes like soy.
So, Jamie, on slide 6, I made a chart comparing the amino acid profile in beef to several different plant proteins like white beans, soybeans, peas, and rice.
What you can see there is beef is higher in every single amino acid than every plant protein that's compared there with the exception of soybeans are slightly higher in tryptophan than beef.
Look at leucine.
So beef, it's 2.23 versus 0.58 for white beans, 1.3 for soy.
Soy is higher in leucine than any other plant protein, which is why it's often used.
And then like 0.3 for peas and 0.01 for rice.
joe rogan
If you get to a certain number or a certain level of all these, so if you ate enough food that you would pass a certain marker, Would it be possible to have the same effect by eating cooked peas or soybeans?
chris kresser
It is possible, for sure.
But you have to eat a higher number.
You have to eat an enormous amount of that, as you can see, because of the levels.
And this is why a lot of vegan bodybuilders and athletes end up using protein powders, because you can get to those amounts...
Easier by using the powders.
And you can also blend, like, you know, 70% pea with 30% rice to get the right amino acid ratio easier with powders.
So, like, Patrick Baboumian is a good example of that, you know.
Did you see the video that Bobby Geist made?
No.
So, there's actually a video...
joe rogan
Oh, is that the one that you sent me?
Yes, I did see that.
chris kresser
There's a video that Patrick made himself of his own diet on what he eats on a daily basis and it turns out to be a boatload of protein powder and just shakes with all kinds of powders and supplements and things like that.
Yeah, we can go through it.
So he starts with a bunch of different supplements in the morning, multivitamin, nutritional yeast, zinc, glucosamine, magnesium, calcium, B12, and iron.
Then he has a protein shake with soy protein powder, creatine, and beta-alanine, which probably is because he's aware of the research showing lower levels of muscle creatine and carnosine in vegans.
Beta-alanine and creatine would address that.
Then he has a post-workout smoothie with soy or pea protein powder, glutamine, beta-alanine, creatine, and dried greens.
And then his first solid meal of the day is fried falafel, french fries, soy sausage, fried peppers, and tomatoes.
And then he has some more protein shakes and smoothies throughout the day.
So I don't know.
That doesn't strike me as a super healthy way to eat.
joe rogan
What problem do you have with that?
chris kresser
Well, first of all, I think we should primarily get nutrients from food whenever we can.
I'm not against supplementation.
I think there's a role for it, of course, especially with things like vitamin D that you might not be able to get enough of from food or therapeutic supplementation if you're dealing with a health problem.
But eating a diet that is not sufficient in the amount of nutrients that you need and then using supplements to address that doesn't make a lot of sense to me.
joe rogan
Well, in his situation, he's got a very unique situation that he's a strength athlete.
That's all he's doing is trying to lift really, really heavy things.
So he needs to maintain a certain amount of bulk.
chris kresser
He needs to have an enormous amount of protein.
joe rogan
Yeah, an enormous amount of protein.
He's very heavy.
And that sport is also a steroid sport.
I mean, it's just one of those sports where it's like bodybuilding.
It's a steroid sport.
unidentified
Mm-hmm.
joe rogan
So you're eating massive amounts of quantities.
You're taking chemicals.
Yeah, it might not be the healthiest thing.
But it's also like just the sport itself might not be the healthiest thing.
I mean, you've seen them carry people on the – he was doing that in the film.
That's not good for your back.
chris kresser
Yeah.
joe rogan
That's fucking crazy.
But it works for what he's trying to do.
Obviously, it's working for what he's trying to do.
There's no dispute in that.
See, what he's doing is almost like the intelligent way if you want to be vegan and do what he's trying to do.
I don't know if he could eat just vegetables and pull that off.
chris kresser
He couldn't.
But that's kind of the point.
There are a lot of other strongmen that do.
joe rogan
Like Robert Oberst.
chris kresser
That you had on the show.
joe rogan
Yeah, he just eats meat and rice.
chris kresser
Right.
joe rogan
That guy eats pounds and pounds of beef and rice.
chris kresser
Simple, you know, accessible form of carbohydrate and a lot of protein.
joe rogan
And it's an unfair comparison, and Oberst talked about him on the podcast before.
He's much larger.
chris kresser
A lot of the strongmen are huge.
Like the guy who played Gregor in Game of Thrones, right?
joe rogan
Yes, he's one of them.
chris kresser
He's like 6'8 or 9".
Yeah, he's enormous.
joe rogan
And Patrick is not.
He's not nearly that size.
chris kresser
He's 5'6 or 5'7 or some things.
joe rogan
So the comparison between him and a guy like Oberst in those legit top of the food chain, strongest man in the world competitions, it's not comparable.
chris kresser
Totally different weight class.
joe rogan
Robert is enormous.
He's so much bigger.
But the problem is, in the film, they don't make that distinction.
And they try to pretend that this guy is one of the strongest men in the world.
He's not.
He's very strong, no doubt.
And he definitely has broken some records in some competitions and have different weight classes.
But you're not talking about a guy who wins those Magnus von Magnussen fucking competitions where they're carrying trucks and shit.
chris kresser
Well, I mean, I guess my point, too, was, like, is it the best example of how an athlete can thrive on a plant-based whole foods diet?
joe rogan
Well, I think it is, though, because for him, for his size, you know, to be a guy who's 5'7 and is carrying that fucking enormous amount of weight, he's obviously doing something that's very impressive, and he's doing it while he's on this vegan diet.
And again, I mean...
Discounting all the illegal supplementation, because I don't think it is illegal in that sport.
You kind of have to do it if you want to get that big.
But if you want to do it and do it as a vegan, he is showing you that it's possible.
So in that sense, I defend what he's doing.
Because I think that he...
That's the only way in that...
But this is a very sport-specific area of performance.
He's just talking about lifting insanely heavy shit.
And he's doing that and thriving on a vegan diet.
chris kresser
Yeah, no doubt, you know, enormously strong and he's succeeding.
I would argue that he might do even better if he was eating, you know, more nutrient-dense food and he might need to take fewer supplements and drink less powder.
joe rogan
Yeah, but I think from his perspective...
chris kresser
That's my bias.
I'm more like a whole foods person and, you know, that's where I'm coming from.
joe rogan
Another problem that I had in the film, especially in relations to sport, is the Nate Diaz-Conor McGregor comparison.
First of all, Nate Diaz is not a vegan.
Nate Diaz eats fish and he eats eggs.
And he does try to follow a whole food vegan diet, I think, during camp.
So I would have to talk to him about that.
I know he's done interviews talking about that, but I've definitely seen him eat fish.
I watched him on the Anthony Bourdain television show and he was eating fish.
I know he's eating eggs.
He doesn't eat land animals.
I think what he does is avoids red meat.
chris kresser
Well, fish and eggs take care of it.
unidentified
Yes.
chris kresser
Because, you know, fish is actually higher often than meat in terms of protein, ounce for ounce.
It's also very high in collagen, which is super important for recovery and repair, and explains lack of collagen probably explains why a lot of vegan athletes get injured, which we can talk about more later.
And then eggs, as you know, are super, you know, they're really high on the DS scale, they're bioavailable, lots of other nutrients, so...
joe rogan
Here's another problem with that whole comparison.
First of all, Nate Diaz is a fantastic fighter.
He's a long-time mixed martial arts veteran.
He's outstanding in all areas.
He has a fantastic submission game.
His brother, Nick Diaz, is one of the best in the world.
He's also outstanding.
And his brother, Nick, I believe, is vegan.
He's probably a better example.
Even though Nick hasn't beaten some of the top fighters in a few years, back when he was in Strikeforce, he was top of the food chain.
He's an elite fighter, for sure.
I'm not sure if he was vegan back then.
I'd have to ask him.
But the point being that Nate is an exceptionally skilled athlete, and he was coming into that fight on extremely short notice.
So he was most likely following his off-camp diet, which is eggs and eating fish and things along those lines.
And I think he said he was partying in Mexico.
So who knows what the fuck he was doing.
It was like 11 days out.
They call him and they set up this fight.
I forget how many days out it was, but it was a very, very short amount of time.
Was preparing for a 155-pound fight against Rafael Dos Anjos.
So he was reducing his caloric intake, dropping his weight down to try to make this 155-pound weight class.
It's a big cut for him.
So when you do that, you are in anticipation that the person you're fighting is also doing that.
So you both kind of agree that you're going to be in a certain weakened state when you actually weigh in at 155 pounds.
chris kresser
So was that like two weight classes below his normal?
joe rogan
Well, let me keep going.
So he's...
That was the first and only time...
Well, except the rematch with Nate was the only time that he's fought at 170. So they made a decision to fight at 170 instead of 155 because Nate did not have time to reduce his calories and cut the weight.
And it takes a long time.
It's a slow process of...
Nate is a big fella.
He walks around probably over 200 pounds.
Easy.
And he drops weight.
And he didn't want to drop that much weight.
He's a big guy, man.
He's big and long.
And Connor was dropping his weight down to 155, so he's 10 days out, and he just starts packing on food, eating as much food as he can.
Not only that, but stylistically, Nate's a nightmare for him.
Nate has a fucking evil submission game.
He's tough as nails.
His endurance is always fantastic because off-season, he's always doing triathlons, and he's always doing endurance sports.
I mean, he's in phenomenal shape, and his jiu-jitsu is many levels better than Connors.
I mean, he's a legit top-of-the-food-chain MMA black belt in jiu-jitsu.
So they have this fight.
Connor gets tired.
Nate beats him up, gets him on the ground, submits him, and they're saying this is a victory for veganism.
What they don't say is, five months later they fought and Connor beat him.
They fought again.
This time they had a full training camp.
Connor prepared, and it was a very close fight, I should say.
You could have scored it either way.
I mean, it was a really close fight.
Razor thin.
But the fact remains, Connor beat him in the rematch.
So they leave this out of the narrative.
I'm Oh my god, the vegans are dominating.
Look, vegan dominated.
But this is a last minute fight.
Conor goes up in weight.
Nate Diaz steps in and takes care of business and wins the fight.
It speaks more to how good Nate Diaz is than a vegan diet.
chris kresser
Right.
joe rogan
And it doesn't take into account that four months later or five months later, whatever it was, he loses.
chris kresser
And he's not vegan.
Yes, and he's not vegan.
He follows it sometimes.
There are a few other examples like that in the film where you catch a certain window of it, but they don't show what happens afterwards.
We talked about the vegan honeymoon.
So, Brian Jennings, the boxer, they talked about he went vegan in the end of 2013. He was 17-0 before he was vegan, and he's 7-4 after that.
So, you can't say that that's because he transitioned to a vegan diet, but you can't also say, nor can you say that veganism improved his performance.
I mean, objectively, he's gotten worse since then.
joe rogan
Well, the argument against that would be that he's moving up into the upper echelons of the heavyweight division, and it's filled with killers, like any combat sport.
And that as he got in, many fighters don't make it.
They get in.
He lost to...
Wasn't it one of the Klitschkos?
Yes.
I think he lost to Vladimir.
I think he lost to Vladimir Klitschko in a decision, and he handled himself very well.
It was a very good fight for him.
He looked real good.
But yeah, I mean, that upper, when you get to these Andy Ruiz, Deontay Wilder, I mean, killers.
It's like most people that get up into that division, they start losing.
chris kresser
He's a good example, too, of this principle of context being everything.
Because he said in the film, my early years growing up in Philly, the only thing we knew was spinach in a can, collard greens and Popeyes, KFC, everybody frying chicken.
I grew up not even knowing about half these other vegetables.
Asparagus, to me, just came out like five years ago.
Right, right.
joe rogan
Again, vegan honeymoon.
chris kresser
Going from a crappy standard American diet to a whole foods diet, I don't doubt that someone's going to feel better.
But would you have felt better, like you said, eating some grass-fed bison and some eggs along with all of those plants?
That's the question.
joe rogan
Yes, that is the question.
And this is the real purpose, my real purpose for getting involved in these fucking discussions over and over and over again.
I want people to understand that there's nuance to this.
And there's also biological variability.
There's some people that are...
They can get along on certain diets easier.
There's some people that have a horrible time with seafood.
There's some people that have a horrible time with certain grains.
We are all different.
We come from an enormous planet where your ancestors developed and your genes developed in different parts of the world.
We're all different.
But what we know about nutrition, it is so important that we are honest about what we know.
This is the problem I have with a lot of these documentaries.
They're not honest about what they know.
They're only giving you little snippets and cherry-picking data and doing things like the study that showed that the vegan diet can clinically reverse heart disease.
You're using all this deception.
Pretending that the gladiators chose to eat gruel.
Like, this is how we're going to kick ass.
We're just going to eat barley.
The fuck out of here.
This is nonsense.
And they know it's nonsense.
Either they know it's nonsense or they just fucking slap some blinders on their head and just plow straight ahead and ignore anything that conflicts with any of these thoughts that they're expressing.
chris kresser
I mean, there's so many examples of this in the film.
One was this lettuce has more antioxidants than salmon or eggs.
Well, so what?
I mean, we're not saying don't eat lettuce, right?
I mean, I've always argued that the optimal diet includes both plants and animal foods, and there's reasons for that.
Plants contain some nutrients that animal foods don't, and animal foods contain nutrients that plants don't.
joe rogan
You've been very consistent about this.
chris kresser
Eat both of them, right?
unidentified
Yeah, I mean...
joe rogan
An orange has more vitamin C than a beefsteak.
chris kresser
Right.
joe rogan
That's just how it goes.
chris kresser
But we could just easily say a serving of salmon has 716 times more selenium than lettuce and provides 100% of the RDA of B12 where lettuce provides 0%.
But I'm not going to say that because that's ridiculous.
I'm not trying to get people not to eat lettuce.
Exactly.
joe rogan
You're not on team...
And there's another thing that's going on right now, these carnivore folks, which I find fascinating because they are as ideologically driven as vegans.
We have the anti-vegans.
It's like we have Antifa and then we have the alt-right.
Now we have the carnivores and we have the vegans.
And both of them dig their fucking heels in the sand.
And both of them are committed to thinking that their side is the only way to go.
And Rhonda Patrick has talked about this many, many times when people start discussing negative aspects of eating food, particularly plants, because of stressors.
And she's like, no, there's actually...
An effect where your body's reacting to them that's beneficial, much like when you get in a sauna, your body reacts to the heat, it's actually beneficial for your health.
chris kresser
That's hormesis.
joe rogan
Yes.
chris kresser
That's how exercise works, right?
You lift a weight until you can't lift it anymore, your muscle tissue breaks down and it rebuilds stronger the next time.
joe rogan
So these folks that are talking about don't eat vegetables, because vegetables give you these things that are bad for your body, like, okay, are you sure?
I mean, there's a lot of work to be done here, folks.
There's a lot of fucking research to be read into, and there's a lot of conversations you have to have with people far more educated than you and the subjects.
chris kresser
I think often as humans we have a hard time differentiating between our own experience and what works for us and then larger, bigger picture.
So take someone who has a severe autoimmune disease, they go on carnivore, their symptoms disappear.
That's pretty compelling.
It's really understandable why they would be passionate about that and why they would want to continue that approach.
But again, like I said before, we're not always choosing between one great alternative and one terrible alternative.
joe rogan
It is interesting to me, though, that one thing that we have been lied to about is that you need vegetables.
Because you don't need it.
Just much like with the RDA, you need a certain amount to not starve to death.
You don't necessarily need vegetables.
There's a whole community of people out there that's thriving and not eating a single piece of vegetable.
It's really interesting.
chris kresser
The problem is we just don't know what happens long term there.
joe rogan
I got my eye on Sean Baker.
chris kresser
Look, I want to be clear.
It might be fine.
joe rogan
It seems like it is.
chris kresser
I don't know.
I'm just saying we don't know.
So you're introducing an element of uncertainty because if you look at it from an anthropological perspective, every group of people we've ever studied in human history has eaten both plants and animals in different proportions.
joe rogan
What about the Comanches?
What about the Comanches?
One of the things I was reading about the Comanches, or as I was listening to this audiobook, what is it called?
Summer moon, Empire of the Summer Moon.
It's amazing.
I'm recommending it too much.
I've got to shut the fuck up about it.
But one of the things they talk about is that the Comanches ate very little berries or fruits or vegetables.
They mostly just ate buffalo.
chris kresser
Well, the Inuit also ate very little, especially during the winter.
But they went to great lengths to trade for plant foods, and in the summer they ate more plant foods.
So the proportions vary.
You know, the Maasai, for example.
Yes, very, very.
They eat milk, meat, blood, and they eat some plant foods.
But then you have other groups that ate more plant foods.
You know, there was a study, ethnographic study of hunter-gatherer cultures done, 230 roughly cultures studied, and they found that on average...
So hunter-gatherers got about 70% of their calories from animal foods and about 30% from plant foods.
So that's percent of calorie.
That's not looking at a plate because animal foods are more calorie dense.
So it still might be two-thirds of the plate is plants and one-third is animal foods if they use plates.
But that's the rough percentage.
But it would vary from place to place.
We don't know of any group...
That exclusively and by choice, not from living in a marginal environment like the Arctic, but by choice, ate only animal foods for a long period of time.
And a lot of the research that we have, the clinical research, suggests that plants have some useful nutrients, especially some fibers that can feed the beneficial gut bacteria.
There are studies showing that Extremely low-carb diets can have some maybe not great effects on the gut flora.
So again, it could be fine, but we just don't know.
And so you're adding an element of uncertainty there.
That's all I'm saying.
joe rogan
So there could be a carnivore honeymoon, as it were, just like you're talking about the vegan honeymoon.
So your contention, and this is my belief as well, is that most human beings fare better on an omnivorous diet.
chris kresser
With both plants and animal foods.
And what proportion of plants and animal foods will depend on all the factors that you mentioned, genes, epigenetics, health status, geography, whatever else is going on.
But for some people, that might just be a small amount of animal foods.
It might be Nate Diaz, some fish and some eggs, and then the rest, plant-based diet.
For other people, it might be a lot more animal foods.
That's where I think the individual variation comes in.
joe rogan
And I'm sure most of these athletes that are following a vegan diet, like you were talking about earlier with Patrick, they're taking protein powders.
So they're allowing themselves to get a large dose of protein to fulfill their requirements simply and easily in a shake form rather than having to wolf down four or five bowls of protein.
chris kresser
And if they're not, they're probably not doing that well.
So we have like all these stories of NFL and NBA athletes that went vegan and then stopped because they were not able to maintain their weight or they got injured and they weren't able to recover.
In the show notes for this, I have many, many examples of pretty high-level NBA and NFL athletes.
joe rogan
Just read off with you.
Cam Newton is one of them, right?
chris kresser
Cam Newton is the most recent one.
So he went vegan in February.
He had the worst season of his career.
He had minus two yards on five carries in the first two games, and he rushed for more than 30 yards, 33 yards a game only once in his last nine starts.
joe rogan
How Cam Newton's vegan diet may be hurting Panthers quarterback play in injury recovery.
What is this on?
What website is this?
unidentified
This is his notes.
joe rogan
Oh, it's your notes, but it's from a website.
chris kresser
No, it's from a website.
Yeah, there's references.
And then he developed a Liz Frank injury in his foot.
joe rogan
That's a broken foot, right?
chris kresser
It's a broken foot and really hard to recover from.
And some people think it certainly could be career-ending.
I mean, if you lose 10, 20 pounds, that's a big deal for a high-level athlete because the studies have shown that that can interfere with muscle protein synthesis.
It can also increase inflammation and make recovery more difficult.
But the other thing is if they're not eating the protein powders, they're not taking collagen, for example, a vegan source of collagen.
Collagen is critical for muscle recovery and repair.
And it's hard to, you know, you can make some collagen, but I think a lot of people on a plant-based diet, if they're high-level athletes and they're not really getting collagen coming in, it's going to be difficult.
joe rogan
When Travis Barker was in a plane crash, he was, like, severely burned, and they were having a hard time getting him to heal, and he started eating meat in order to heal, because he's a vegan.
I mean, he owns, what's it called, Crossroads, in a really amazing vegan restaurant in L.A., and he talked about it on the podcast.
He was just wolfing down beef jerky, just trying to eat meat in order to get his body to heal.
chris kresser
That couldn't have gone over well.
With the vegan community.
joe rogan
Well, I mean, he was just being honest.
I mean, Travis is super, super honest.
He's just saying.
But he chooses to not eat meat other than that.
He just did it to recover.
And then once he recovered, he went back to his normal vegan diet.
chris kresser
So you have Djokovic, who's best tennis player of all time, probably.
When he first went dairy-free and gluten-free, he was number one in the world.
He went vegan.
Ranking dropped to 22, which was the lowest he'd been since he was a teenager.
And then he started adding fish back into his diet and, you know, back up to number one.
You have Damien Lillard from NBA. He went vegan for five months.
But then he added animal protein back to slide 35, Jamie.
He said, I did it, but I started to lose a little bit too much weight with all the games and practices and all that.
I had to balance it out, so now I've been mixing it up a little more, having vegan meals and still mixing it up with other stuff.
So it sounds kind of similar to Nate, you know?
Mostly vegan, but adding some animal foods back in there.
You had Tony Gonzalez, Hall of Fame, tight end, went vegan, and three weeks later, there was an article about this.
It's in the show notes.
The 100-pound dumbbells he used to easily throw around felt like lead weights, the article says.
I was scared out of my mind, Gonzalez said.
He had lost 10 pounds.
He ended up adding small amounts of animal protein back to his diet.
You've got Gerald McCoy, NFL. He said, quote, the explosiveness wasn't sustainable because I didn't have that extra oomph that I needed because of the lack of the type of protein I was taking in, so I just added a little bit of animal protein back in my diet, and it's given me that oomph back.
joe rogan
No, again, we're talking about elite athletes with very specific nutritional requirements because they're asking a tremendous amount of their body.
chris kresser
I mean, these guys could probably need like 4,000 to 5,000 calories a day to function well.
And of that, you know, if they weigh 250 or 275, they need 250 to 275 grams of protein and it should be high in leucine.
joe rogan
scene for muscle protein synthesis and it should be bioavailable you know all that and in so in comparison to the average person the average person who followed their diet probably wouldn't see any detrimental effect for a long time because they're not requiring their body to do these incredible things i don't know It varies.
chris kresser
I mean, I've had patients who went vegan and within two months they were in really dire straits.
And there are people who go vegan and they're fine for their whole life.
joe rogan
Hormones are a big one, right?
And why is that?
chris kresser
Everything, you know, micronutrients really run the show.
I mean, of course, the macronutrients, protein, fat, carbohydrates are important.
And as I said before, you know, if you're 200 pounds, the average American weight is male is 200 pounds.
And so if they're in a vegetarian, they're consuming the average number of grams of protein.
That's less than the updated RDA. We looked at that on that slide.
So I would argue that even for the average person, protein could be a problem, both quantity and quality.
Most people are getting plenty of carbohydrates and enough fat, so that's not an issue.
Then it comes down to micronutrients.
So think B12. That's the thing that came up in the film a number of times.
So we should talk about that a little bit because there was some actually just factually inaccurate information about B12 that I want to correct.
So, the claim...
This is slide 55, Jamie.
James said B12 is not made by animals.
It's made by bacteria that these animals consume in the soil and water.
Before industrial farming, farm animals and humans could get B12 by eating traces of dirt on plant foods or by drinking water from rivers or streams.
But now, because of pesticides and antibiotics and chlorine that kill the bacteria, this vitamin even...
That produces this vitamin.
Yeah, that produces this vitamin.
Even farm animals have to be given B12 supplements.
That's just all false.
That's all just factually wrong.
So first of all, B12 is made by bacteria, but animals don't get it from consuming soil and water.
The B12 is made by bacteria in their gut.
So in ruminants like cows, in the rumen, which is a chamber in the stomach, the bacteria convert cobalt that they get from grass that they eat into cobalamin, which is B12. And then they are foregut fermenters.
So they can absorb the B12 the bacteria produce in their intestines and utilize that themselves.
Primates, including humans, also have bacteria that make B12, but we're hindgut fermenters, so we cannot absorb the B12 that our own gut bacteria make.
Well, that's not exactly true.
Chimps and gorillas can, but that's only because they eat their own poo.
So that is one potential strategy for meeting your B12. I hope you didn't just put that out there.
You can be coprophagic.
joe rogan
We will find ethical poo eaters.
There's a whole community now of Reddit.
Ethical poo eaters is now a new subreddit.
chris kresser
So we cannot get B12 from our own gut bacteria.
And if there is any B12 in soil, it's only from manure that's come from animals.
There's also zero evidence that B12 is fed to cattle, and there's no evidence that humans have ever been able to meet their B12 needs from just eating soil and water.
If you pull up slide 56, Jamie, Jack Norris, who's a vegan dietician, you know, we don't agree on a lot of things, but I appreciate his rigor with the science.
He has a big article on B12 and I don't know where to go with that claim because it's demonstrably false, even from the perspective of a vegan registered dietitian.
joe rogan
Yes.
Yeah, I don't know why he said that either, but I just think that that's something he probably heard, and he was probably having a conversation with someone, and they told him that, and he just repeated it.
chris kresser
Or maybe one of the doctors on the show brought that up.
joe rogan
People repeat a lot of these things, and then they become dogma.
chris kresser
So here's the other thing.
The second part of that claim was up to 39% of people tested, including meat eaters, are low on B12.
As a result, best way for humans to get enough B12, whether they eat animal foods or not, is simply to take a supplement.
He didn't provide a reference for that, so I can't-- it's hard to check that.
But again, this contradicts mounds of evidence on B12 deficiency.
So there's four stages of B12 deficiency.
I don't want to go too far in the weeds here, but basically serum B12, which is the marker that's usually used, only goes down in the fourth and final stage of B12 deficiency.
There are other markers that will go out of range earlier that are more sensitive and detect those earlier stages.
So the most sensitive marker is holotranscobalamin or holotc.
So, in a study in 2013, this is slide 58, Jamie, they compared B12 depletion according to holotranscobalamin levels in vegetarians, vegans, and omnivores, and you can see the results here.
Only 11% of omnivores had B12 depletion, 77% of vegetarians, and 92% of vegans.
That's a pretty big difference.
joe rogan
That's a big difference.
chris kresser
That's a big difference.
joe rogan
And B12 is responsible for energy.
That's one of the reasons why when people are feeling sick, they get a B12 shot.
chris kresser
Well, it's also required for the myelin sheath in our nerves.
B12 deficiency can cause serious and even irreversible neurological damage.
A lot of the harm that happens with kids on a vegan diet comes from B12 deficiency.
It can decrease fluid intelligence.
It can cause neurological damage that's not reversible even after they start eating meat again.
joe rogan
Maybe that's what's going on with them in this information.
Maybe they have legitimate neurological damage.
Is that possible?
chris kresser
It's possible.
One more, if I can, because I'm just passionate about this because it's super important.
Slide 59. So homocysteine is a marker that is also more sensitive than serum B12. It's a sticky inflammatory protein that's associated with heart disease and dementia.
So 9 out of 10 comparisons that looked at B12 levels or homocysteine levels in vegetarians and omnivores found higher homocysteine levels in vegans and vegetarians.
Higher means worse, and it means more B12 deficient.
And in fact, the studies, they said the prevalence of hyperhomocysteemia, which is high homocysteine levels reflecting low B12, among vegetarians may actually be higher than among non-vegetarians already diagnosed with heart disease.
So this is kind of a big deal.
It's like the B12 issue is serious, and even folks like Jack Norris, to their credit, do acknowledge it and strongly recommend that people who are on a vegan diet supplement.
So if people watch this film, you know, I'm glad to hear James saying that vegetarians and vegans should supplement.
I don't think omnivores need to, usually.
You can watch that film and get the idea that B12 is maybe not that big of a deal.
It's a big deal.
joe rogan
A lot of the film was reenactments as well.
When James was sitting there with the knee braces on, that was not after his surgery.
chris kresser
I thought he was vegan in 2011 or 2012 or something.
joe rogan
When he's in the film, when they're filming him, he's sitting there doing his research.
I don't think they filmed him while it was happening back in 2012 after the injury.
chris kresser
One of the things that I thought was well done about the film was that they took someone, James, on the journey of starting as an omnivore and then having these realizations and turning into a vegan.
But the problem was...
That journey happened long before the film was made, I think.
So that was a little disingenuous, too.
joe rogan
Well, that's why I'm saying he's sitting there with those knee braces on and he's going over his research and just happened to have a camera crew there while he's learning how to heal himself.
And I'm like, hey, man, I know what you're doing.
chris kresser
I don't know.
I mean, that's a narrative device.
It's good filmmaking.
joe rogan
Even the rope thing.
Even the rope thing.
I mean, I'm watching him do the rope thing.
At the end, like, ooh, boy, I'm done.
You just did an hour.
Bro, if you did an hour, you'd be fucking drenched with sweat and you'd be exhausted.
They sprayed you or something.
But it's fine.
I believe he really did that.
I don't believe he's a liar, but like...
chris kresser
I mean, like you said, he's clearly an amazing athlete and ripped and super capable.
And this was an agenda-driven film.
It's meant to persuade and convince people.
joe rogan
Well, that's why it's weird because that's clearly acting.
You're recreating these moments.
unidentified
Right.
chris kresser
But it's marketed as a documentary.
joe rogan
Because he's talking about it having just happened right after he switched over to a vegan diet.
All of a sudden he could do an hour on the battle ropes.
And then they're filming them.
chris kresser
Yeah.
joe rogan
I'm like, come on, man.
There's no fucking camera crew where that happened.
You're redoing this.
chris kresser
Yeah.
joe rogan
I mean, I get it.
This is how you show the footage, you put it out there, and it makes it a little bit better for people to swallow and get.
And I like the scenes of him doing the self-defense demonstrations, because you get to see he truly is a fantastic martial artist.
He really does know his stuff.
chris kresser
Absolutely.
joe rogan
There's a lot of great aspects to that.
Like I said, I like that guy a lot.
But there's a lot of fuckery in this movie, man.
chris kresser
So, I mean, a couple of the most ridiculous things from the movie...
joe rogan
You can get to boners?
chris kresser
We can get to boners.
So, slide 64. You probably remember this morning.
This was the guy who's, like, in Africa.
He was a former Special Forces sniper, I think.
joe rogan
Yes, yes.
chris kresser
And he says, this whole fantasy we need to eat meat to get our protein, it's actually bullshit.
I mean, look at a gorilla.
A gorilla will fuck you up in two seconds.
What does a gorilla eat?
I just do the same things as these big gray things out here that we're trying to protect, elephant and rhino.
That's just, it's a nonsensical argument.
You know what will fuck you up even faster than the gorilla?
A human who has a gun that eats McDonald's and KFC. I'm serious.
What is a gun?
It's a tool.
How did we develop tools?
Because we started eating meat and fish, and we came down out of the trees, and we weren't spending more than half of our waking hours eating leaves and low-calorie fruits.
Comparing our digestive...
What we should eat with a gorilla is just asinine.
joe rogan
That's a problem because they bring that up all the time.
They say, we have the same digestive gut tract as an herbivore.
That's just not true.
chris kresser
Also, just objectively false.
For a gorilla, the largest volume of their digestive tract is in their large intestine, which is ideal for breaking down tough foods, fiber, seeds, and those kinds of plant foods.
Whereas in humans, the largest volume of our digestive tract is in the small intestine, which is better for absorbing nutrient-dense bioavailable foods like meat and cooked foods, cooked tubers and things like that.
A gorilla, in order to get the amount of protein that gets them strong and ripped, they eat 40 to 60 pounds of food a day, and they're eating for more than half of their waking hours.
So it's really, you know, that's just not comparable at all to compare us to...
joe rogan
We also have different genes.
It's the same thing when they're talking about oxes, like strong as an ox.
There's a myostatin issue, right?
Yes.
The genes are programmed to carry more muscle.
chris kresser
So, yeah, that's Patrick Babumi, and he says, you know, people ask me, how did you get strong as an ox without eating meat?
Yeah.
Have you ever seen an ox eating meat?
Well, I say, have you ever seen a human with six different stomachs standing in a field eating grass for 14 hours a day?
That's ridiculous.
It is ridiculous.
To me, those damage the credibility of the movie.
joe rogan
Well, it's just sound bites that sound cute.
Like people go, yeah, have you ever seen an ox eat that?
Eat what a gorilla eats.
That's what I do.
chris kresser
Yeah, plant-based.
unidentified
Yeah.
chris kresser
Right.
It just, to me though, that's like the quality of the argument being made.
It really does.
joe rogan
There's no one there like you to dispute it.
That's the problem.
You know, that's why I bring you aboard.
chris kresser
I mean, and then there was the anthropologist woman.
You remember that scene in the end where she, that's where I really started rolling my eyes because she was making the arguments that humans have always followed a plant-based diet.
Did you remember that part?
unidentified
Silly.
chris kresser
Okay, so we're going to start with that.
So, I mean, we've got isotope studies that show that humans have been eating meat for at least two and a half million years.
And if you go back even before we were really actually human, there's a lot of evidence now that our chimp ancestors were also eating vertebrates.
One of the biggest shocks for people has been the observation that chimps hunt and they kill other monkeys and other animals and eat them.
I mean, it kind of blew apart this whole idea of primates only eating plants.
If that happened, if an animal evolves complex behavior like hunting or tool use in order to eat certain food, it means that food has a lot of value or else that behavior wouldn't have evolved.
But then we have bone collagen studies.
Let me see if I can find this slide, Jamie.
So that's 47 and 48. So bone collagen isotope studies are much more accurate than some of the previous methods that were used.
And the earliest hominids that were studied with these were Neanderthals.
So there's three studies that have been done in Neanderthal groups ranging from 130,000 to 28,000 years ago.
And then they compared those isotope levels with contemporary species.
And they found that Neanderthals were similar to top-level carnivores.
So they all derived the vast majority of their protein from animal sources, likely to be large herbivores.
And then on the next slide, 48...
joe rogan
Why does it have...
Hold on a second.
Back up.
Why does it have a pterodactyl flying in the background?
Why are they bullshitting us?
Does those fucking things live 60 fucking million years before?
That's so stupid.
chris kresser
You know, there's a limit to what stock photography can come up with.
joe rogan
I know, but all you have to do is snip that part out, you asshole.
Why do you have a guy walking on two feet with a fucking piece of meat on a stick?
chris kresser
A big stick of meat.
joe rogan
That's so stupid.
chris kresser
And he's obviously not a Neanderthal, too.
The skull is the wrong shape.
joe rogan
Yeah, the skull is the wrong shape, right?
Yeah.
chris kresser
Yeah.
joe rogan
That's double crazy.
So that's a homo sapien, which is only 500,000 years ago.
chris kresser
Bad stock photo.
Well, let's talk about homo sapiens.
So on the next slide, there are two stable isotope bone collagen studies that have been done with modern humans, homo sapiens sapiens.
And the first group was 13,000 years ago in southern England, and the second group was 30,000 to 40,000 years ago in La Gravette, which is in France.
And they also found that they were, you know, carnivores, mostly large herbivores, but the French group consumed a more diverse mix of protein, including seafood.
So the fossil record clearly, clearly indicates that humans were eating, you know, humans and Neanderthals, you know, homo sapiens and Neanderthals, all of our hominid ancestors were eating a lot of meat.
joe rogan
And she wasn't using any evidence to cite this either, was she?
chris kresser
She was using that lame anatomical argument that we have, you know, relatively flat molars like herbivores do, and we don't have claws, we don't have sharp canine teeth.
But guess what?
We've got forks, we've got knives.
joe rogan
And we've got fire.
chris kresser
We've got fire to cook our food.
joe rogan
Yeah, and we had fire for a long fucking hour.
chris kresser
We have these adaptations that make those anatomical characteristics that a lion or a carnivorous animal has unnecessary for us.
I mean, that's just like Anthropology 101. So they just found someone who's vegan who's also an anthropologist.
Yeah, one anthropologist, and then they rewrite the whole history of animal food consumption among hominids.
joe rogan
Yeah, and the argument that human beings over two million years ago, the doubling of the human brain size corresponds with the learning how to hunt, consuming more meat...
chris kresser
The appearance of tool marks on bones corresponded directly with the doubling of brain volume, the reduction in our gut volume, which indicates a move to a more nutrient-dense diet, the increase in the volume of our small intestine relative to our large intestine, and then what's called the gracilization of our jaw,
which means our teeth and jaw became less robust, And that's thought to be an adaptation to more digestible, nutrient-dense, bioavailable food where we're not like chewing cud or chewing on leaves or low-calorie fruit like a gorilla is all day.
joe rogan
And this argument about nutrient density, this is why that term is very important because people always want to use that for plant-based foods, nutrient-dense, plant-based foods.
Meat is far more nutrient-dense per calorie, per ounce, per amino acid profile, With essential nutrients, yeah.
chris kresser
So essential meaning nutrients that we can't manufacture on our own and that we absolutely need.
Organ meats are actually at the top of the list in terms of nutrient density.
Organ meats and shellfish take the cake.
Then you have herbs and spices are actually pretty high too.
And then you have other, you know, muscle meats, eggs, all those things.
Foods like grains and legumes tend to be towards the bottom of the list, you know, with vegetables in the middle.
joe rogan
Right, but that sounds good.
Nutrient-dense plant-based food sounds good.
It sounds like you're doing the right thing.
And this is like where this lingo is coming from.
chris kresser
I mean, this is where I argue that plants do belong because plants do have certain nutrients, phytonutrients, fibers, and things that actually don't feed us but feed our gut flora that I do think are important.
Even though they're not considered essential like vitamin B12 or vitamin A, you know...
Vitamin D or something like that, I do think they're still important and they play a role.
joe rogan
What I'm talking about is the difference between caveman altering its diet or ancient man altering their diet and this doubling of the human brain size corresponding with consuming more nutrient-dense foods.
What that means is meat.
chris kresser
Yeah, absolutely.
Meat, fish, and fish as we saw with some of the modern humans who are living in coastal regions.
But these more bioavailable nutrient-dense foods, definitely.
joe rogan
Now, what other silliness?
So this is the anthropology argument that just doesn't seem to fit any of the state-of-the-art science.
chris kresser
It doesn't fit.
Yeah, it completely contradicts.
So then there was the whole section that you probably remember about chicken and fish causing cancer, dairy products causing cancer.
They started to just...
It really kind of went from just like you can do well on a plant-based diet as an athlete to like animal products are horrible and are going to kill you, which was a big leap.
So they had one study, James Wilkes says, you know, research funded by the National Cancer Institute found that vegetarians who had one or more servings per week of white meat like chicken and fish more than tripled their risk of colon cancer.
Well, that's scary.
You know, I don't want to triple my risk of colon cancer.
But again, if you look at the totality of the research, slide 42, Jamie, 2017, a meta-analysis of 16 prospective studies with almost 2.5 million participants found no increase in cancer risk from consuming fish or poultry.
And then you have a statement from the American Cancer Institute itself saying, So where's that coming from then?
One study that looked at Seventh-day Adventists who added some of those foods back into their diet.
This is a perfect example of healthy user bias because Seventh-day Adventists are not supposed to eat meat.
So if you have a Seventh-day Adventist who's rebelling and eating meat, Then what else are they doing that is also not healthy and not following the dictates of that healthy lifestyle?
joe rogan
They didn't take that into consideration?
They didn't ask them whether they're drinking?
chris kresser
That was a six-year study in the Seventh-day Adventist cohort from 1976 to 1982. And it was what I call them SDA rebels.
They're supposed to eat vegetarian, but they add meat.
So what else are they doing that's confounding that?
joe rogan
And the reason why this is relevant is this is the only study that we know of that does show a correlation between...
chris kresser
There might be other individual studies that do, but this is why we have these large reviews.
This one looked at 16 studies with 2.5 million participants and found no association.
And then that's why you have groups like the American Cancer Institute who say...
You know, they make this recommendation.
joe rogan
Well, I mean, people were up in arms at the most recent recommendation that people have been told to avoid red meat.
chris kresser
Oh, yeah.
joe rogan
And then they said, well, actually, there's no risk at all eating red meat.
We're taking that off of the list of foods to avoid.
And everybody went apeshit.
They just went apeshit.
chris kresser
Let's talk about that.
joe rogan
For lack of a better term.
chris kresser
Yeah, they did.
They freaked out.
Yeah.
joe rogan
Because it conflicts with the dogma.
chris kresser
Absolutely.
And this was...
This was a five-paper review.
So it wasn't just one paper.
It was five papers all in one review.
It was millions of participants.
They reviewed all of the available literature on red meat and its relationship with any disease, heart disease, cancer, type 2 diabetes.
It was dozens of studies following people for up to 35 years and millions, again, millions of participants.
They looked at randomized controlled trials.
They looked at observational cohort studies.
They looked at all kinds of outcomes, total mortality, cardiovascular, cancer, etc., And they found, quote, only low or very low certainty evidence that red meat causes any kind of disease.
And then in the editorial, in the Annals, which is what it was published, Annals of Internal Medicine, the journal it was published in, they said, quote, this is slide 19, Jamie.
Over and over again, they, the authors, stressed that even if the results were statistically significant, their certainty was low and the absolute differences seen were small and potentially confounded.
Meaning, could have been that they were smoking more or drinking more or not exercising or whatever.
unidentified
Right.
chris kresser
The editorial also said, this is sure to be controversial, but it's based on the most comprehensive review of the evidence to date.
Because that review is inclusive, those who seek to dispute it will be hard-pressed to find appropriate evidence with which to build an argument.
joe rogan
Unless you have a nice documentary.
chris kresser
Yeah.
joe rogan
You can just put in whatever fucking evidence you want.
chris kresser
Ignore it.
Yeah.
joe rogan
Yeah.
The really frustrating thing for people is also recommend it's unprocessed and processed.
So the dogma has always been, well, just stay away from processed meat and you can avoid.
chris kresser
Yeah, because some studies showed no difference with fresh, but some difference with processed red meat.
I think you could make a stronger argument that too much processed meat might be harmful because of things like nitroso compounds that are formed, etc.
But even then, you have to consider context.
Most people are eating hot dogs with buns.
French fries and big gulps.
It's probably a different effect than having bacon a couple times a week with your whole foods diet or having some salami and nuts.
Not the same as eating fake processed meat all the time.
joe rogan
And one of the things that's weird about this whole conversation is there's a battleground.
So like a volley gets thrown out there like this.
Like boom!
It's okay to eat red meat.
And you see the other side scrambling to refute the evidence and then fire back with all these epidemiology studies that show that red meat can kill you and red meat's causing you to age quicker and red meat kills your boners and red meat does this and does that.
And it's like there's a religious war going on.
chris kresser
It's the same thing we were talking about earlier.
Now, when you have some kind of political event or some event that happens, it gets spun.
You know, if you go watch CNN, it's going to get spun one way.
If you go watch Fox, it's going to get spun the other way.
It's the same event, but you have these totally different interpretations.
joe rogan
Yeah.
What else was a bummer?
chris kresser
Well, you want to talk about the boners?
joe rogan
Sure, let's talk about the boners.
I found that to be entirely hilarious, ruthlessly unscientific, and like the whole thing with the guy saying, you know, I'm going to eat what a gorilla eats.
I mean, they're showing this guy who's protecting rhinos who are being slaughtered for their horns.
Like, what does that have anything to do with eating meat?
chris kresser
Yeah, they're morally equating that with eating...
joe rogan
Exactly.
Well, what they're doing is...
chris kresser
It was pretty obvious what they were doing there.
joe rogan
Yes.
chris kresser
Even though they didn't say that, that's what they were doing.
joe rogan
They're attaching themselves to an indisputable cause.
chris kresser
Yeah.
joe rogan
You know, I mean, everybody wants people to stop shooting rhinos for their horns.
Everyone does.
If you don't, you're an asshole.
Don't eat meat.
What?
How'd you get that in there?
You guys snuck that in there.
What the fuck did you do?
unidentified
Yeah.
chris kresser
Yeah, so for those who haven't seen the film, the boner experiment, if we're going to call it that, it was Aaron Spitz, who's a urologist, and he puts penis rings on a bunch of NFL players, and then he measures the effects of different meals on their erections, both the circumference, I guess, the size of the erection, the duration, and the intensity of the erections.
So he feeds the players burritos with meat in them and then he feeds them the same burrito with like a plant protein.
I'm not sure what it was, tempeh or something like that.
I think it was beans.
Was it beans?
Okay, maybe.
And then he claims that the athletes who ate the pure plant burritos had 500% more frequent erections and also increased strength of erections.
So what can we conclude from this experiment?
Absolutely nothing.
Because it was just an experiment that was made up and done in a film.
It was not peer-reviewed.
It's not scientific at all.
That's the whole scientific system.
joe rogan
Well, here's how it could have been scientific, right?
If they did it in different orders.
So they put the...
The penis band on the dudes one night.
They had them eat whatever the fuck they had them eat.
I think it was steak burritos.
And then the next night, they put the penis bands on them again, and they have them eat beans.
And so they say they got more erections.
Did you guys jerk off in between then?
Did you guys have sex?
Did you get used to having the penis band on?
When you slept with it the first time, did it bother you?
Did it interrupt your sleep?
The second time, were you more comfortable with it?
Did you guys try to reverse it?
One day, the first day, on a different group of people, give them the band and make them eat a vegetarian diet.
Then the next day, give them the band on the second day and make them eat steak.
Did you switch that up?
chris kresser
You can ask any number of questions, and that's the whole point.
joe rogan
Of science.
chris kresser
That's why we have science.
That's why we have a process of peer review.
That's why we have reproducibility, meaning even if one group comes up with one finding, it's not really worth much until somebody else reproduces that.
Something like 90% or more of scientific findings are not reproduced.
That means that we can't trust them, so.
joe rogan
I would like to know if they were asked to not engage in sexual intercourse or masturbation during that time period because that would make sense that they were getting more erections and more fuller erections the next day, especially the young guys that are savages out there playing football.
chris kresser
I went to look at research.
Like, is there any peer-reviewed research that shows that plant-based diets are better for erectile function and lower the risk of erectile dysfunction?
Couldn't find anything.
I did find studies.
One study of a Mediterranean diet, which includes some animal products, reduced erectile dysfunction relative to a low-fat diet, which maybe might have fewer animal products.
So that kind of contradicts it, perhaps.
There were studies that showed that, like, diet quality is important.
So Western diet and high in processed foods led to erectile dysfunction, diet rich in flavonoid-containing foods, which would be fruits and vegetables, reduced erectile dysfunction.
But none of that says it has anything to do with meat.
It just says, like, don't eat a junk food diet if you don't want erectile dysfunction.
joe rogan
Yeah, it's just deceptive.
Totally.
But, you know, it does show that those guys did get more hard-ons under that circumstance.
But as you said, what does that mean?
chris kresser
What does it mean, and can we even trust it?
I mean, frankly, given some of the other stuff in the film...
joe rogan
Right.
Can you trust it?
chris kresser
Can you trust that?
unidentified
Right.
joe rogan
I mean, who's to say, right?
There was another thing that was deceptive, or at least it confused people.
That's when they made them eat a bean burrito, and they checked their blood, and then they made them...
I was just sitting there shaking my head going, what in the fuck are you doing?
This has nothing to do with health.
chris kresser
So again, not a peer-reviewed experiment, something that was a controlled study in any way, just something that they did in the film.
So yeah, they fed the burritos with meat, without meat, and they measured their blood afterwards.
Big surprise if the people who ate meat, which has more fat and more saturated fat, had cloudier blood.
Well, that's normal.
That's just naturally what you would expect from the process of eating feet.
You will temporarily have more fat in your blood.
joe rogan
It has nothing to do with health.
chris kresser
So what is the big question.
unidentified
Right.
joe rogan
Might actually be better for you.
chris kresser
Might be better for you.
And so then I went and I thought, okay, well, what does the peer-reviewed research show about animal protein and endothelial function?
Because their claim was that eating the animal protein reduces your endothelial function and increases inflammation.
So there was one...
There are a couple studies that show a low-carb diet impairs endothelial function, but they tend to be short-term, like four weeks.
I look for longer-term studies.
There was a 2009 study that followed subjects for 12 weeks, and they found that a low-carb diet actually improved endothelial function, whereas a low-fat diet decreased it.
And then there was a 2007 study that followed subjects for a year, and there was no change in endothelial function on a low-carb diet.
There's strong evidence that high blood sugar and insulin resistance impair endothelial function.
So a low-carb diet that would lower your blood sugar and improve insulin resistance would be expected to improve it from that perspective.
So again, when you look at the actual science, the actual peer-reviewed research, you don't see that relationship that they're talking about.
joe rogan
They didn't even, I mean, when they're showing it to you, it's just scare tactics.
They're not talking about what that means.
chris kresser
It's persuasive.
You know, people see it and they're like, oh my god, the blood is cloudy.
Even the football players were in the experiment.
They were like, oh wow, I'm not going to eat my KFC or Popeyes anymore.
And I'm like, well, you probably shouldn't, but it's not for that reason.
joe rogan
Right.
Well, saturated fat is the demon, right, that keeps getting addressed.
Explain why saturated fat is not only healthy, but probably necessary.
chris kresser
Well, I don't know that it's necessary, but I would say that, you know...
joe rogan
Well, I should say cholesterol is necessary.
chris kresser
Well, cholesterol is necessary, and our body makes it, too.
Actually, most of the cholesterol that we have in our body, we manufacture.
It doesn't come from the diet.
About 30% comes from the diet.
About 70% we make.
The exact ratio varies depending on the person.
Some people are hyper-responders of dietary cholesterol, so they'll absorb more from food.
But it plays a vital role in the body.
There's a genetic disease called Smith-Lemley-Opitz syndrome, which results in severe cholesterol deficiency, and it's fatal.
So you die with not enough cholesterol.
I'm not, however, one of these people on the other end of the spectrum that thinks, hey, if your cholesterol is 450, don't worry.
No problem.
Just write it off.
I think the truth is somewhere in the middle.
joe rogan
And it's biological variable.
chris kresser
It's variable, yeah.
And I see this.
I've been working with patients for over 10 years.
I test every single person that comes through the door with a full lipid panel.
And I have people who are doing keto, super low-carb diets who have totally optimal normal cholesterol.
And then I have people who go from eating, you know, a moderate-fat diet to like a high-fat keto or low-carb diet, and their LDL-P goes up to 2,500 or 3,000, and their LDL cholesterol goes up to 300. So,
yeah, I mean, what I can, I think what, stepping back a little bit, as we talked about this with Joel, but cholesterol for decades was, it was the boogeyman, you know, it was like, that led to like egg white omelets and boneless, skinless chicken breast and, you know, bagels with nothing on them when I was growing up.
And now even the- Margarine.
Margarine, oh my God.
I can't believe it's not butter.
unidentified
Yeah, sure.
joe rogan
I thought it was better than butter.
Hilarious.
chris kresser
Which rats won't even eat if you leave it out in the garage.
joe rogan
Really?
chris kresser
Yeah.
Really?
Yeah.
joe rogan
Rats eat batteries.
They won't eat margarine?
chris kresser
That's what I've heard.
I've never done this experiment.
joe rogan
We need to do an experiment.
chris kresser
You should do it.
joe rogan
Otherwise, we're pushing out disinformation as well.
chris kresser
Propaganda.
So yeah, you know, the U.S. quietly actually removed the limitation of dietary cholesterol.
They used to limit it to 300 milligrams now that they don't have that anymore because the evidence didn't justify having that in the dietary guidelines.
We were the last industrialized country to do that.
Every other country had done that years ago.
But because, you know, how entrenched that was in our country, and I think, you know, they don't want to lose credibility.
It's like they've been saying not to do something for so long, then to turn around and say, actually, there's no evidence to support that.
You lose face.
joe rogan
And when people talk about saturated fat and they talk about it as being only a meat or animal diet issue, one thing that I always like to bring up is avocados.
chris kresser
Yeah.
joe rogan
There's a certain amount of unsaturated fat and saturated fat.
chris kresser
Every food has all three fats in some proportion.
So you have saturated, monounsaturated, and polyunsaturated.
And dairy products are actually the only category of foods that consistently have more saturated fat than any other type of fat.
Pork, for example, often has more monounsaturated fat than saturated and even sometimes lean beef.
And what's really interesting about that is that studies consistently show that full-fat dairy, which would be like the highest saturated fat class of foods, is associated with reduced risk of heart disease, reduced risk of diabetes, reduced weight.
And all kinds of other improvements.
joe rogan
Full-fat dairy is?
Is this raw dairy, like raw milk?
chris kresser
They're not differentiating like that in the studies.
Just any full-fat dairy.
joe rogan
Why do you think so many people are lactose intolerant then?
Because that's an issue.
And I think I seem to have it a little bit.
My nine-year-old daughter definitely has it.
chris kresser
Well, so it wasn't until 11,000 years, 12,000 years ago, we didn't raise animals for dairy.
So there was no need that we only had to digest lactose while we were breastfeeding.
So like in a hunter-gatherer culture, as soon as you stop breastfeeding, you no longer had the need to digest lactose.
And so our bodies are efficient.
We stopped producing lactase, which is the enzyme to break down lactose for the rest of our adult life.
But then about 12,000 years ago, we started, you know, somebody figured out, hey, let's drink some milk from that ruminant animal over there.
And dairy products help people avoid starvation, and there was a good source of hydration and nutrients.
And so that mutation started to spread.
And now it's about one-third of the world has lactase persistence, which means they can digest lactose all the way into adulthood, and two-thirds don't.
And it depends a lot on your ancestry.
joe rogan
So two-thirds people are lactose intolerant to some extent.
Wow, that's interesting.
chris kresser
So the people who tend to be lactose tolerant are people of European, particularly Northern European descent.
Like lactose tolerance or lactase persistence approaches like 97% in Scandinavia.
So Denmark, Norway, Sweden, they can almost all...
Digest milk.
And then East Africans, so you have like the Maasai, you know, people who've been raising cattle for a long time tend to have that capability, whereas like in Asia, other parts of Africa, and other parts of the world, not as much.
joe rogan
What difference, if any, does it make when it's not homogenized and pasteurized in terms of your digestion?
Because for me, I don't have a problem with raw milk.
Raw milk seems to be easy for me.
chris kresser
Yeah, I think there is a difference.
I mean, it contains enzymes in it that help you break down the lactose.
So that can make a difference.
But, I mean, just...
I would love to see research that further differentiates the health benefits of dairy according to whether it's organic or whether it's homogenized or not and all that.
But even just talking about dairy as a whole category...
I mean, you had Dr. Walter Willett in there saying, there's evidence of high consumption of proteins from dairy is related to higher risk of prostate cancer.
The chain of cancer causation seems pretty clear.
But if you bring up slide 44, Jamie, there was a 2019 study.
Largest review of dairy ever been done before.
It was 153 meta-analyses that they reviewed.
So not just individual studies.
They reviewed 153 studies that were also reviewing other studies.
And 84% of the meta-analyses on dairy showed either no association or an inverse association between dairy and cancer, meaning when it's inverse, it means people who ate more dairy had lower rates of cancer.
So it's frustrating to see someone make a claim like that, and then you go and you look at the full totality of the research and you see a just exhaustive study like this with 153 meta-analyses.
And 84% are showing no relationship or a beneficial effect of dairy on cancer.
Why wasn't that mentioned in the film?
joe rogan
Well, it's consistent with the way the message is being distributed through the entire film.
It's a propaganda movie.
I mean, that's essentially what it is.
chris kresser
Yeah, so...
joe rogan
It's like reefer madness for meat.
I mean, it really is.
chris kresser
Yeah, yeah.
So...
joe rogan
It's kind of crazy.
chris kresser
It is crazy.
I mean, there's...
The thing that's hard, I mean, and this was true with Joel, is like that was three and a half hour plus debate.
I don't know how long we've been going now, and we've even barely scratched the surface of like what we could say about the movie.
Yeah.
And...
It's frustrating because these kinds of movies leverage this rhetorical effect called the illusory truth effect, which is basically if you repeat something enough times, it starts to sound true.
And politicians are great at this.
Trump is actually a master at this.
So, you know, meat is bad, meat is bad, meat is bad, meat is bad.
We've heard that so many times that someone can get on, make a film, and just include one little tidbit of information and say meat is bad, and it seems like, oh, that's true.
But then to break that down, we're here for...
Two and a half hours and we're just getting started.
joe rogan
Yeah.
chris kresser
That's the trouble.
joe rogan
Yeah, that is the trouble.
And it's not nearly as visually enticing.
It's just you and me sitting here talking.
Where's the pretty girls running track and everybody laughing and having a good time eating falafels?
chris kresser
There's how many vegan documentaries that have been made?
Like a lot.
What the Health, Cowspiracy, this one.
How many pro-regenerative agriculture, holistically managed, healthy, nutrient-dense meat movies can you think of?
joe rogan
I can't think of any.
chris kresser
Yeah.
So there's one coming, fortunately.
It's called Sacred Cow.
It's coming out next year.
Rob Wolf is involved in that.
I was interviewed by it.
Diana Rogers, who's a registered dietitian, is making it.
She's also a regenerative farmer.
So it's a very interesting perspective.
Having someone who knows the nutrition side and who's also...
Actually using those kind of regenerative, holistically managed practices on her own farm.
You know, but it's not...
James Cameron's not behind it.
It's not going to have Arnold in it.
joe rogan
You know Arnold's eating a steak right now.
That motherfucker, he's full of shit.
He just wanted to do...
James Cameron's like, look, we're doing The Terminator.
I really want you to be a part of this.
unidentified
I'll do it.
I mean, only vegetables from now on.
joe rogan
This steak was just bullshit.
I shouldn't have eaten it.
I want to catch that motherfucker, Fogo the Chow, with that little chip on green, just hacking at...
Look at him.
unidentified
I mean, this thing is why it's so big.
chris kresser
The thing is, he didn't become Mr. Universe by eating, drinking soy protein shakes.
joe rogan
Well, I mean, again, he's eating steroids.
That's what he's eating.
That's what he was eating.
chris kresser
But he was eating also 250 pounds of beef protein a day.
Not quite that much, but grams maybe.
250 grams.
He wasn't eating five cups of lentils to do that.
joe rogan
No, he wasn't.
chris kresser
That's the other thing, too.
You have to recognize with this movie, like...
A lot of the people who were amazing athletes, they didn't start out vegan.
They weren't born to vegan parents and then were vegan growing up and then had all these amazing records and performance.
They built their strength or their agility or their speed or whatever on a diet with animal products.
And then at some point, they became vegan.
And, you know, maybe their performance continued and they continued to do well like Scott Jurek or Dottie Bausch.
Or maybe they had the vegan honeymoon where they did well for a while and then they declined.
Or maybe they just declined like some of the NBA and NFL athletes we talked about.
But this is a critical point because there are key developmental periods when we're kids and also in utero that if you're not getting the nutrition you need then, it's going to carry through to your whole life.
And so it's like, what did your parents eat?
What did your mom eat when she was breastfeeding you?
What did you eat as a young kid?
So we follow that whole argument through.
If everyone becomes plant-based, It's going to have a huge intergenerational impact on performance.
It's not like people who built their strength and performance eating meat and then they go vegan and they do okay for a little while.
It's like, what are the consequences of that happening to everybody?
joe rogan
What are the consequences of growing up nutritionally deficient?
chris kresser
Yeah.
Of the mom starting that way and then getting pregnant and becoming deficient during pregnancy and then the baby being breastfed by a mom who's nutrient deficient and then the kid being fed a vegan diet and developing B12 deficiency which then has irreversible effects.
joe rogan
Are there any top of the food chain world champion vegan athletes?
Like the best of the best.
There's no vegan UFC champions.
There's no world champion vegan boxers that I'm aware of.
chris kresser
There's Ilya Ilyin.
Do you know him?
joe rogan
No.
chris kresser
He's the weightlifter that's, I think, in the same weight class as Kendrick Ferris, who was in the film.
Mm-hmm.
And two-time Olympic champion, where I don't think Kendrick has won, he's not won a gold medal.
But he was stripped of his titles because he tested positive for steroids.
So once again, you know, what's happening, it's hard to say.
joe rogan
He was pulled from the film because of that, right?
chris kresser
Yeah.
He was pulled from the...
Or was he in the film?
joe rogan
I believe he was originally supposed to be in the film now that you brought this up.
chris kresser
Yeah, that's not a good narrative for them, right?
And then they had like Tim Sheaf, if I'm pronouncing his name correctly.
He's like the free runner parkour guy who was going to be in the film.
And then he had this very public I'm not vegan anymore because it was destroying my health video on YouTube.
joe rogan
He ate a piece of salmon and had a wet dream for the first time in a decade.
Right.
Like, okay, buddy.
chris kresser
I mean, it was like...
joe rogan
Poor bastard.
chris kresser
Yeah, it was...
joe rogan
Fucking starving.
chris kresser
He was doing everything.
He did a 30-day water fast.
Yeah.
Like, he tried everything to stay on the vegan diet.
It wasn't like, oh, it's hard.
I'm going to eat salmon.
joe rogan
I should also tell you, he thinks the earth's flat.
chris kresser
Oh, does he?
joe rogan
Yes.
chris kresser
Uh-oh.
unidentified
Yeah.
chris kresser
Yeah.
joe rogan
I bet that could be the vegan diet.
All those years rot in his fucking brain.
chris kresser
Yeah.
Well, one of the main guys, you know, the anthropological argument that humans are herbivores because we don't have claws and sharp teeth?
That all comes from Milton Mills, a 1987 paper from him.
He's an emergency room physician.
He has no training in medical anthropology or comparative anatomy or anything like this.
He is a creationist.
So he thinks that we were just built this way and with these teeth and the way by God.
joe rogan
Yeah, that whole why don't we this?
If we are a carnivorous species, why don't we this?
How come we don't have the teeth to do that?
You know, how come you can't just grab a squirrel and eat it?
I've actually heard a guy say that.
Well, hey, fuckface, how come you can't eat lentils?
You gotta boil them.
They're like, what are you talking about, man?
Try eating cassava without cooking it.
You'll die.
chris kresser
Yeah, you'll die.
Cyanide.
Poisoning.
joe rogan
Yeah, it's like that argument is so stupid.
There's a lot of plant-based foods that are only consumed after lengthy cooking.
chris kresser
Yeah.
I mean, going back to your question, I'm sure there are high-level vegan athletes.
But the thing is, a lot of the people who are commonly referred to, like the Williams sisters, Serena and Venus, they're not vegan.
Yeah.
joe rogan
Yeah, why do they have that in the film?
They showed them in the film, and I was like, wait a minute, they're not vegan.
chris kresser
Because people often call them vegan, and they occasionally will have periods of veganism, I guess.
joe rogan
Do they?
chris kresser
But they're not vegan.
They eat meat, they eat animal products.
joe rogan
They look like meat eaters.
chris kresser
Tom Brady is another example.
joe rogan
Another one who looks like a meat eater.
chris kresser
Who really does eat a lot of, predominantly plant-based, I guess, but eats meat, especially in the winter.
joe rogan
The Williams sisters are They're so powerful.
I mean, it would be a great catch for that team if they were vegan.
Look at the athleticism that these girls have.
But nope.
But it was weird.
They didn't say they were vegan.
They just showed them.
And so you're like, oh, they're the best.
chris kresser
They don't need to say it.
They just show them and that's it.
joe rogan
Well, same thing with Arnold.
He's talking great about veganism.
I can't run fucking tea right now.
Carving into a nice juicy ribeye.
Come on, show me a picture.
What is he doing?
Oh, that fuck?
chris kresser
Epic Mealtime.
jamie vernon
He did a video with them like five years ago, eating an 80,000 calorie steak and egg sandwich.
joe rogan
Jesus Christ, Arnie.
When is this?
Ostrich eggs?
chris kresser
A couple years ago.
joe rogan
Oh, that's five years ago, bro.
That's a long time ago.
jamie vernon
He could be all vegan now, I guess, but...
joe rogan
I doubt it.
He was doing this while they were doing the new Terminator movie.
chris kresser
Yeah.
joe rogan
It's a James Cameron movie.
He's not stupid.
Holla at your boy.
chris kresser
And even if he is now, he wasn't then when he accomplished all of his athletic achievements.
joe rogan
Yes, of course.
But that's where it's weird, right?
It's like he did everything spectacular with meat, and now he's saying, you don't need it.
chris kresser
Yeah.
jamie vernon
Two years later, he's part-time vegan, he's saying in this article now.
joe rogan
Now?
unidentified
After the film?
Two years after that epic mealtime thing.
Oh.
chris kresser
Part-time vegan.
That's a funny concept.
How are you part...
I'm sure vegans would take issue with that.
joe rogan
I heard a guy arguing with someone about this once.
I talked about this.
He said, I'm 90% vegetarian.
And this was his argument.
Vegetarian is the way to go.
I'm 90% vegetarian.
Like, bitch, that's 0% vegetarian.
unidentified
That's right.
joe rogan
You don't understand math.
You don't understand math.
chris kresser
It's even more ridiculous with vegan because there's a whole ethos obviously around it.
joe rogan
I'm 90% on fire.
Bitch, you're on fire.
unidentified
Yeah.
chris kresser
Oh man, that doesn't make any sense.
It's so stupid.
Like I said before, all it takes is a little, because like organ meats and shellfish and fish and eggs are so nutrient dense, you don't have to eat a lot of them to get to meet your nutrition needs.
joe rogan
Yeah, I've had this conversation with vegans too about mollusks.
And I was like, you know, I've heard it argued, and Sam Harris was talking to me about this, that you can actually make an ethical argument that mollusks are more primitive than plants.
And that plants actually exchange more information through mycelium, through their root structure.
They actually communicate with each other.
chris kresser
More evidence of intelligence.
joe rogan
Yeah, mollusks are an older creature, and they're just dumb hunks of meat you can scoop out of a container.
I mean, they have no idea you're there.
They have just basic movement where they clamp shut.
That's it.
I mean, they're not going, stop, no.
They're not trying to get away like a fish.
Mollusks just fucking lay there.
chris kresser
And they happen to be, like I said, among the most nutrient-dense foods on the planet.
Like one serving of oysters, I think, will meet your need for zinc for the entire week.
joe rogan
Yes, that's pretty impressive.
chris kresser
We're talking about like...
joe rogan
And that's always been associated with male virility.
chris kresser
Zinc is super important for so many different functions.
joe rogan
For boners, they should have done that test, right?
Eat a bunch of raw oysters.
Imagine that, like eight times more than the guys who were eating plants with a ring around their penis.
What else is going on with this film that drives you crazy?
chris kresser
Well, I mean, going back to the whole environmental argument, I mean, that's another big one.
We didn't get a chance to talk about that as much with Joel, because it would have been nine hours instead of four hours.
joe rogan
His way of communicating is just so frustrating.
It's so...
Awkward.
Car salesman-y.
chris kresser
So one of the most common claims is like, you know, cattle are eating all of the human food.
So like, you know, corn and things that we could feed the world with.
Yes.
Well, the reality is 86% of what cattle eat is not edible by humans.
We talked about that before.
They're eating soy cakes and grass and fobs and things that we can't Digest and absorb.
joe rogan
But I think the argument would be that if you just grew the same, use that same area to grow human food, you could do that because we're using that area to grow cow food.
chris kresser
Well, so you replace the feedlot beef with grasslands and then you have naturally, you know, holistically managed cattle there and then you take the land that we can't, as I said before, 60% of land you can't grow crops on.
So you can't say that.
You can't say we can just take everywhere that we could have livestock and plant.
joe rogan
I'm not even saying that.
Anywhere we have monocrops where we're growing food just for feeding cows, you could grow, say, tomatoes.
chris kresser
That's one option.
But the other option is to use that land for grasslands, which could make it a carbon sink rather than having still emissions coming from mono-industrial agriculture.
joe rogan
I understand what you're saying, but I mean, if I was on the other side, I would argue, well, wouldn't it be easier to just grow human edible corn in that place instead of...
chris kresser
No.
joe rogan
No?
chris kresser
No, because corn is ridiculously low in nutrient value.
joe rogan
Or something else.
Yeah.
chris kresser
Or soy or whatever.
Yeah.
If you look again at this idea that animals are the middleman, yes, that's not a bad thing.
That's a good thing.
If you look at the conversion ratio of feed like corn, which is super nutrient poor, you know, corn is low in protein.
It doesn't have many nutrients at all.
2.6 to 2.8 kilograms of corn get converted into 1 kilogram of beef.
So even in that 14% of human edible food that livestock are eating, they're converting it to highly nutrient-dense, bioavailable protein that humans can eat.
And if you do the conversion with just protein instead of by weight of food, they take 0.6 kilograms of corn or other low-value protein and convert that into one kilogram of very high-value nutrient-dense protein.
So it's always more nuanced than the argument makes it seem.
joe rogan
Yeah, that is the point.
chris kresser
The water is another example.
joe rogan
Yeah, I was going to bring that up next.
chris kresser
So, you know, 2,400 gallons of water to produce a pound of beef is the typical claim that you hear.
What you don't hear is that the vast majority of water, even from feedlot beef, 94% is green water, which means it's rainfall.
Only 6% is groundwater, like from irrigation.
For pasture-raised beef, it's even more significant.
97% of the water for pasture-raised beef comes just from rainfall and 3% from irrigation.
Beef, if you only think about blue water, like irrigation, it requires 280 gallons of blue water per pound of beef.
That might sound like a lot, but it's actually less than you need to produce a pound of avocados, almonds, walnuts, rice, or sugar.
But you don't hear that.
joe rogan
No.
chris kresser
In the film or in these arguments at all.
joe rogan
And again, it speaks to what you're saying.
These are nuanced issues.
chris kresser
These are nuanced issues and the devil is in the details.
joe rogan
And so we're talking about with cow...
Again, we have to stress that only somewhere in the neighborhood of 2-3% of all cows are grass-fed, grass-fed.
Yeah.
The ones that are eating grain are consuming more water, but even then it's still less water than they're saying.
chris kresser
Exactly.
And less than some other commonly eaten vegan foods.
joe rogan
Especially almonds.
Almonds are particularly, they're very resource heavy, right?
chris kresser
Absolutely.
Yeah.
But sugar?
I mean...
unidentified
Yeah.
joe rogan
That's crazy, huh?
chris kresser
Yeah.
joe rogan
Yeah.
What else about the film?
chris kresser
Do you want to talk about fake meat?
joe rogan
Sure.
chris kresser
A little bit?
Yeah, let's talk about that.
It wasn't covered as much in the film.
joe rogan
But I think it's important for someone like you that really understands it to talk about it so people get...
This could be a standalone clip.
chris kresser
So just for people who aren't aware, there are companies like Impossible Burger and Beyond Meat that are promoting this idea of fake meat that tastes like meat, but it's made typically from soy.
So Impossible Burger's main ingredients are GMO soy, coconut oil, sunflower oil, natural flavors.
Beyond Meat is pea protein isolate, canola oil, refined coconut oil.
So Impossible Burger has publicly criticized holistic land management or regenerative agriculture and saying, ah, it's not really that different.
In fact, sometimes the emissions can be even more than feedlot beef.
But there was a third-party lifecycle analysis, full lifecycle.
So they looked at the whole process, not just methane emissions from cows burping, but the whole process.
At White Oak Pastures, which is a beef operation.
It's a Savory Institute hub.
So they're following the Regenerative Savory Institute practices.
And they found that their beef operation was a net carbon sink.
So again, it actually sequestered carbon from the atmosphere.
It was not emitting carbon.
It was, you know, carbon, not neutral.
It was taking carbon out.
joe rogan
Can I pause you for a second?
This is something I forgot to bring up earlier.
One thing that solves the methane issue with cows is just to add a certain amount of seaweed to their diet.
When you add a certain amount of seaweed to their diet, apparently it mitigates the methane issue.
chris kresser
I don't know about that.
joe rogan
See if you can find that, Jamie.
That's something that was offered up as a response to...
And I don't think it's a large amount of seaweed.
I think it's a fairly small amount of seaweed in percentage to the overall diet.
chris kresser
I think the amazing thing about the regenerative livestock or holistically managed beef, though, is it can actually restore grasslands.
It can restore the soil and improve the soil.
So you're not only producing this amazing nutrient-dense bioavailable food source, you're actually improving the soil and helping to reverse this really dramatic, threatening problem that we're facing of soil erosion.
unidentified
Here it is.
joe rogan
Seaweed could help make cows burp less methane and cut their carbon foot hoofprint.
LOL. Diet supplemented with red algae could lessen the huge amounts of greenhouse gases emitted by cows and sheep if we could just figure out how to grow enough.
So I guess that's the issue.
chris kresser
You have to wonder what kind of energy is being used.
So back to this.
So this life cycle analysis at White Oak Pastures showed that this holistically managed beef actually removes carbon from the atmosphere.
Now this was the same company that performed a life cycle analysis for Impossible Burger.
On their fake meat.
And what they found in that analysis was that the fake meat was less of a greenhouse gas emitter than feedlot beef, but it was still actually an emitter.
Whereas the holistically managed beef was taking carbon out of the atmosphere.
It was the same company.
So, you know, if we're going to give them credit for the analysis they did for Impossible Burger, we have to give them credit for the analysis that they did for White Oak Pastures.
The other thing with Impossible Burger, so the primary ingredient is called soy leg hemoglobin, or SLH. So this is a bioengineered protein additive that adds meat-like taste and color.
It does not meet the basic FDA generally recognized as SAFE, the GRAS designation, because it's not a food or even a food ingredient.
And there's a document that you can get.
I think it came with the Freedom of Information Act.
It's online.
I have the reference in my show notes.
And in the discussion in this document with the FDA, Impossible Foods admitted that up to a quarter of its heme ingredient was composed of 46 unexpected additional proteins.
Some of which are unidentified and none of which were assessed for safety in the dossier.
Impossible Burger put the product on the market despite admitting to the FDA privately that they haven't done adequate safety testing.
And according to these documents, quote, FDA believes that the arguments presented individually and collectively do not establish the safety of SLH, soy leg hemoglobin, for consumption, nor do they point to a general recognition of safety.
joe rogan
So they don't know what the fuck it does.
chris kresser
What's in it.
But it doesn't mean it's bad.
It doesn't mean it's bad.
Just haven't done adequate safety testing, in the opinion of the FDA, to release this as a food product.
joe rogan
The company that did the tests on this Impossible Burger versus the Regenerative Beer, what is that company again?
chris kresser
Qantas International.
joe rogan
And so they're the ones who released the information for both studies.
chris kresser
Both studies.
It was the same company that did it for Impossible Burger, and then they turned around and did it for White Oak Pastures, and they found Impossible Burger is still emitting carbon, whereas White Oak Pastures is taking it out.
joe rogan
Yeah, I think that's very critical.
chris kresser
Yeah, and there was an article criticizing fake meat by this woman, Dana Pearls, who's part of an environmental organization called Friends of the Earth, and she says, quote,"...instead of investing in risky new food technologies that are potential problems masquerading as solutions,
shouldn't we be investing in proven, beneficial, regenerative agriculture and transparent organic food that consumers are actually demanding?" The only issue that they would have with this is yes, but now you're talking about killing animals, and we're absolutely morally and ethically opposed to killing animals.
Yeah, I mean, we go back now to this 2018 paper that I mentioned earlier that examined the impact of plant agriculture on animal deaths and found 35 to 250 mouse deaths per acre.
joe rogan
Mouse deaths?
chris kresser
Mouse deaths.
Deaths of mice.
And up to 7.3 billion animals killed every year from plant agriculture.
If you count birds killed by pesticides, fish dust from fertilizer runoff, plus reptiles and amphibians, poisonings from eating toxic insects from the pesticides.
joe rogan
What's the number?
chris kresser
7.3 billion animals killed every year through plant agriculture.
joe rogan
So, in terms of life...
There's far more life taken by plant agriculture than there is life taken by animal agriculture, even factory farming.
chris kresser
Oh yeah, we're not killing 7.3 billion cows.
joe rogan
Right, so the question is, do we value the larger animals more?
chris kresser
Are fish and insects less significant life forms than mammals?
Are small mammals like root rodents less valuable than larger ones like cows?
Is it better to kill many small animals for foods like grains and legumes which aren't very nutrient dense and don't meet our nutritional needs than fewer large animals that are super nutrient dense?
I mean, I'm not claiming to answer these questions, but I think they're questions that haven't been adequately raised and addressed in this ethical argument.
joe rogan
They haven't even been breached.
And this is one that people dismiss offhandedly.
These are lies by meat eaters to justify their consumption.
But what you're saying is...
chris kresser
You could make an ethical argument that killing an animal explicitly to eat it is ethically different than animals being killed as a sort of side effect of plant agriculture.
I'm not saying that that's a valid argument, but I've heard that argument.
joe rogan
I don't think it's a valid argument, because once you're aware of it, you're doing it the same.
It's like the argument that I've had with people when they say that I don't kill animals, but I eat meat, therefore it's better than what you do, because I hunt.
And I say, no, you're killing an animal with your credit card.
chris kresser
It seems backwards.
joe rogan
You're killing an animal.
You're just hiring someone to do it for you.
You'll still go to jail for murder if you hire someone to shoot somebody.
chris kresser
Right.
And you're more disconnected from the whole process.
joe rogan
It's even more bizarre.
The whole thing is very, very strange.
I think that's very important, though, that you listed those numbers, that data, because that's irrefutable and it's one of those arguments that comes up that they just want to bury their head in the sand about.
If you're buying agriculture, unless you have your own organic farm where you are 100% aware of every single aspect from seed to plucking and cooking, if you're not, if you're buying from large-scale agriculture, you're a part of the death machine.
chris kresser
Right.
That's right.
And you're also part of the environmental destruction machine because these huge industrial scale monocropping operations are incredibly harmful for the environment.
And if you, again, you think of pea protein, that's an incredibly processed food.
First of all, just growing peas at the scale you're going to need to have the world's largest pea protein company.
And then all of the processing that needs to happen from taking a pea to an isolated protein powder, which involves fossil fuels and all kinds of industrial processes, that is not an environmentally friendly process.
So, you know, is that better for the planet than having cows that are, you know, being raised on land that couldn't be used for growing plants or other crop production and rotating the animals in a way that restores grasslands and improves the health being raised on land that couldn't be used for growing plants or other crop production and rotating the animals in a way That, again, like Dana Pearls was saying, makes a lot more sense.
It's a proven system than like scaling up industry to make more powders.
joe rogan
Mm.
Yeah, scaling up industry to make pea powder and killing untold numbers of rodents.
chris kresser
Or birds and destroying natural habitats because if you clear a field for peas, it doesn't have the normal natural features.
You don't have the habitat for those animals anymore.
joe rogan
I think it's so significant that you're talking about these regenerative farms because that really is the only way you ever get the nutrients back into the soil.
There was a book that I read many years ago called Dead Doctors Don't Lie where Dr. Joel Wallach talked about the mineral depletion of our soil and that this is something that they've known forever that's like a slow degrading of the nutrient density in the soil.
chris kresser
I mean, that's one of the things that keeps me up at night.
Seriously, like soil and water.
If we don't have soil, we don't know of any way to restore soil once it's gone.
joe rogan
So we have 60 years of soil left?
chris kresser
60 harvests left.
joe rogan
Is that years?
chris kresser
I don't know.
A harvest is probably more than once a year, I would guess.
joe rogan
Really?
I don't know.
I'm not a farmer.
chris kresser
Not a farmer either.
joe rogan
Yeah.
Even if it is...
I think it's once a year.
But I mean, even if it is once a year?
Yeah.
Basically.
It's still...
60 years is fucking terrifying.
chris kresser
That's terrifying.
joe rogan
I knew an asteroid was coming.
chris kresser
Yeah.
I got an 8-year-old daughter.
unidentified
Yeah.
chris kresser
That's her lifetime.
joe rogan
There'd be no food and cannibals running through the streets.
chris kresser
But we'll have fake meat.
joe rogan
I don't even know if we will by now.
chris kresser
We won't because you have to grow soy to get that.
joe rogan
What will we have?
And we'll have no more fish left either.
What else?
chris kresser
Let's see.
unidentified
Oh, there's so much.
Oh, man.
joe rogan
I just don't know how anyone's going to refute this.
Like I said, I really like James a lot.
If he decides to come back and come and sit with you after hearing this and watching this, I don't know what he could say.
chris kresser
Well, you know, it's like you said, when a new study comes out with the meat, then you get the whole group of people pointing to all that epidemiology again saying, look, this study says meat has a higher risk of cancer.
Then we have to do the whole thing again.
Healthy user bias, food frequency questionnaire, context is everything.
That's why it's like, oh my god.
joe rogan
Yeah, yeah.
chris kresser
I think we've hit most of the main points here.
Anything else stand out in your mind from the...
joe rogan
No.
chris kresser
Can you watch it just this morning?
Oh, okay.
So I'd be remiss if we don't at least touch on these.
So, you know, you said before, like, the argument against red meat has always been like cholesterol and saturated fat, right?
And it was interesting in this movie, they didn't really talk about that very much, right?
They didn't talk about cholesterol a lot.
joe rogan
They probably forgot.
chris kresser
They didn't forget, I'm pretty sure.
I think they're actually acknowledging that those aren't super defensible positions at this point.
And so they switched over now to the new kids on the block, which are TMAO, new 5GC, and heme iron.
So there was a guy who said, let's see...
Dr. Scott Stoll, that's slide 18, Jamie.
So he says, in animal products, you're getting protein packaged with inflammatory molecules like new 5GC, endotoxins, and heme iron.
When we consume animal products, it also changes the microbiome, bacteria that live in our gut, and the bacterial species that have been shown to promote inflammation, overgrow, and begin to produce inflammatory mediators like TMAO. So I'll briefly address each of those.
But before I do that, I want to just say a word about mechanisms versus outcomes.
So nutrition research can focus on outcomes, which is like number of heart attacks or number of deaths that happen in a population over a given period of time, or it can focus on mechanisms, what caused those outcomes, right?
So if you use the example of red meat, early, you know, they saw in these big observational studies that people who ate more red meat We know that that was because of healthy user bias.
It wasn't, you know, accurate finding, whatever.
But so then they start going trying to figure out what are the mechanisms.
And so initially, the mechanism was saturated cholesterol, then it was saturated fat.
Now those are not as defensible.
So they're moving on to these new mechanisms.
Well, research on mechanisms is not very convincing if the outcome isn't there.
So you had that large paper that was just published, the five papers in the annals, that showed basically no evidence that red meat is correlated with any disease.
So why are we even bothering looking for all these mechanisms that explain why red meat causes disease when we've got this exhaustive study that says that it doesn't?
joe rogan
Yeah.
chris kresser
But let's humor them and talk about these mechanisms for a minute.
So, NU5GC, that's a sugar.
Basically, it acts as a signaling molecule.
It helps distinguish self from not-self.
Most mammals produce it.
Humans don't.
But, like, cows do.
So, when we eat the cow meat, you know, beef, or drink milk, we get some NU5GC in our tissues.
This is the theory.
And then our bodies attack it in an autoimmune response.
So, basically...
The idea is that new 5GC in meat causes an autoimmune response and that increases the risk of disease.
The problem is that hasn't been proven at all.
A 2003 paper found that feeding people large quantities of new 5GC didn't actually increase their serum levels of new 5GC. So that's a problem.
If you have studies showing that eating it doesn't actually increase it in your blood, Then it doesn't really make much of a difference.
And then you have groups like the Maasai.
You could not design a diet higher in new 5GC. They drink blood and milk from cows and they eat cow beef.
And they have extremely low rates of cardiovascular disease.
joe rogan
And they look great.
chris kresser
I mean, they're ripped.
They're like all thin.
They don't look like people that have autoimmune disease and are dying early.
All right.
So that's new 5GC. Then we have heme iron.
So this is the form of iron that's in beef and other animal products.
So it is true that heme iron forms these compounds called N-nitroso compounds and toxic aldehydes that are implicated in colon cancer.
But again, context is everything.
So slide 22, Jamie.
Studies have found that chlorophyll-rich foods, like plants, basically, if you eat them along with iron-rich foods, that cancels out any potential harmful effect of heme iron.
So this is a study right here.
joe rogan
So that would be a great point to a...
Omnivorous diet versus a carnivorous diet.
chris kresser
Exactly.
This is what I was talking about before, where there's a lot of clinical evidence that suggests that plants play an important role.
joe rogan
Yes.
chris kresser
Do I know for sure?
No, I don't.
But I'm just saying this adds an element of uncertainty.
So yeah, green vegetables, red meat, and colon cancer.
Chlorophyll prevents the cytotoxic and hyperproliferative effects of heme in a rat colon.
joe rogan
There was another thing that they talked about earlier that I just remembered while you were talking.
They were talking about fuel and the difference between carbohydrates for fuel and protein, that protein does not provide you with fuel for muscles, which is not true.
There's something that happens when your body eats protein that it can break it down to glycogen.
What is that called?
chris kresser
Gluconeogenesis.
joe rogan
So that process, they just ignored in the film.
And the woman spoke about this.
Who was it that spoke about it?
I don't remember who spoke about it.
chris kresser
I think it was a man.
joe rogan
Dr. Loomis or something?
Whoever it was that was speaking about it.
When they were speaking about it, they were speaking about it like...
Like, well, here you go.
Like, this is just a fact.
chris kresser
Case closed.
joe rogan
Yeah, case closed.
Your body needs carbohydrates to convert to glycogen.
And that's not true.
Everyone who knows, like, if you eat too much protein on a ketogenic diet, it'll knock you out of ketosis because your body will convert it.
chris kresser
Yeah.
Everyone knows that.
Yeah.
So that was a huge omission or oversimplification.
I think you said this before and I agree with you.
For people who are doing explosive types of activity like MMA or CrossFit or basketball or something like that, they're going to typically do better with carbohydrate, a substantial portion of carbohydrate in their diet.
Whereas, we're seeing a pattern now of endurance athletes or endurance activities.
A lot of those people can thrive on a very low-carb diet.
Zach Bitter is one example, but there are others.
joe rogan
He's not just thriving.
chris kresser
He's killing it.
joe rogan
He's murdering it.
He's literally a world champion at running.
100 miles in under 12 hours, which is just...
chris kresser
It's insane.
That pace is bonkers.
joe rogan
And again, that guy's doing it on ribeyes.
And he does take...
He was talking about how he ups his glucose before these significant events.
chris kresser
Yeah, he's not...
I want to be clear.
I've heard him talk about this.
He's not full-time keto all the time.
He knows what he's doing.
He knows that as he's approaching competition, he needs more glucose.
Replenishes glycogen stores.
joe rogan
Extremely scientific approach.
chris kresser
Absolutely.
But it's not true to say that you don't need protein for muscle.
I mean, protein is all about muscle synthesis.
You can't do muscle protein synthesis without protein.
So that was weird.
joe rogan
Well, also, hasn't it been shown, I think, Lane Norton, BioLane, was talking about this in his debunking of the Game Changers.
It's actually been shown that glycogen absorption, or they get more recovery, that's what it was, from carbohydrates mixed with protein than even carbohydrates alone or protein alone.
chris kresser
That's why post-workout nutrition often is suggested that you have both protein and carbohydrates.
joe rogan
Yes.
chris kresser
So there's one more slide I want to show on the heme iron thing, which is 23 and 24. So this is the largest meta-analysis of heme iron studies.
And again, for people not familiar with the term meta-analysis, it's where you look at a bunch of different studies that have been done and you analyze them together.
It's considered to be a very high-quality form of evidence.
So they looked at all significant studies through 2015, and they found a significant association So what does that tell us?
Go to the next slide, please, Jamie.
Well, if you eat heme iron in the context of a super crappy standard American diet, it's associated with cancer and a problem.
But if you eat heme iron in a European diet, which is less crappy than the US, it's not.
This is a perfect example, again, of context.
joe rogan
Also, Europeans, they don't have grain-fed steak.
chris kresser
Yeah, it's a different quality meat, but I think it's probably more likely that they're not eating that as much.
joe rogan
Yeah, there's far less grain-fed, grain-finished beef over there.
When you eat it, it's really evident when you have a steak over there.
chris kresser
So TMAO and then gut microbata, and I think we're done after that.
joe rogan
Okay.
chris kresser
Unless you've got more.
joe rogan
No, I think we did enough.
chris kresser
So TMAO, this is a molecule that's generated from choline, betaine, and carnitine in the gut by a microbial metabolism.
And some previous studies showed that taking carnitine supplements and taking choline supplements does increase your blood levels of TMAO. In omnivores, they went up by like 37 micromoles per liter and in vegetarians, 27. And that was used to argue that vegetarianism was healthier because they didn't see as big of an increase in TMAO in response to this carnitine and choline challenge.
The problem is that research has not shown that eating whole foods rather than taking supplements increases TMAO significantly, especially eating meat and eggs.
There was a study in 2014 showed you needed to eat four eggs in order to raise TMAO at all, and the max rise was only 3 to 6 micromoles per liter compared to 27 or 37, which I said from supplements in some, and 10 to 15 in others.
And then slide 25, Jamie, this 1999 study tested the effect of 46 different foods on the urinary excretion of TMAO in six different subjects.
And eggs and red meat, as you can see, are barely even registering on the scale there.
Whereas 19 of 21 types of seafood raised TMAO, and halibut raised TMAO 53 times more than eggs did.
unidentified
Wow.
joe rogan
Yeah, the number.
Look at that halibut graph.
It's crazy.
chris kresser
And the cod.
So here you have this argument, okay, TMAO is bad.
We shouldn't eat red meat and eggs because of TMAO. But halibut raises TMAO 53 times more than meat and eggs.
And if you look at the research on seafood consumption, it's almost universally associated with...
Positive outcomes, you know, lower risk of cardiovascular disease, lower risk of death from early causes, all of the rest of it.
So how do we reconcile that here with this TMA argument?
Nobody has ever explained how to reconcile that.
So again, interesting mechanism, but the research is not really persuasive.
joe rogan
It seems like it's poorly understood in the cherry picking data.
chris kresser
The other thing is that back in the original paper by Dr. Stan Hazen about TMAO from 2013, this is slide 26, Jamie, he said the high correlation between urine and plasma levels of TMAO argues for effective urinary clearance of TMAO. So what that suggests is that even if we eat TMAO, our body clears it out pretty quickly in the diet.
So if TMAO is high, it's probably because of other factors.
And studies have found at least three.
One is insulin resistance increases TMAO levels via an enzyme in the liver.
Well, we know that about one in three Americans probably have some form of insulin resistance.
You know, 70% are overweight, 40% are obese.
So it's possible that just being an insulin-resistant, overweight American increases your TMAO. It's got nothing to do with meat.
Gut microbiota, like disrupted gut microbiome, and studies have also shown that SIBO, bacterial overgrowth in the intestine, can increase TMAO levels.
A ton of people are dealing with that, we know.
And then kidney disease, which of course happens in people who have diabetes.
Now 100 million Americans have either pre-diabetes or diabetes, can also increase TMAO. So you've got all of these factors that just have to do with, again, crappy lifestyle, being overweight, being insulin resistant, nothing to do with meat.
Last point.
So there was a whole section in the movie about the meat ruining your gut microbiota.
And I think we're referencing two very low-carb diet studies that did show a decrease in key species of protective bacteria and also in butyrate production.
So this is also one of my questions about carnivore or super low-carb diet for a long period of time.
But again, context is everything.
That's not necessarily the effects of meat.
That's the effects of not eating plant foods.
And there was a good study, slide 27, Jamie, that really established this.
So it was a 2019 study in PLOS One, so it's free, full-text access.
You can go look it up.
Gut microbiome response to a modern Paleolithic diet in a Western lifestyle context.
So they took, I think they were Italians, and they had one group that was on a, they put a group of them on what's called modern Paleo diet, you know, so obviously we can't recreate the Paleo diet,
but just what we all talk about when we say Paleo, And they found, quote, an unexpectedly high degree of biodiversity in modern paleo diet subjects, which well approximates that of traditional populations like the Inuit, Hadza, Matzis, and Peru.
So they found that eating a paleo diet made your gut microbiota look like a hunter-gatherer microbiota.
joe rogan
And by paleo diet, what we mean is meats and vegetables.
chris kresser
Meat, non-starchy vegetables, nuts and seeds, fruits and starchy tubers like sweet potatoes.
So people who ate that diet had a microbiota that resembled hunter-gatherers, which have the best microbiota.
Studies have shown that their microbiota is what we want to have.
So this study shows it's not about the meat, it's about what you eat with the meat.
Which only makes sense.
Because we know what feeds the microbiota.
Fiber.
joe rogan
Is there anything in this movie that they got right?
To end on a positive note?
chris kresser
Yeah, I mean, I think I agree with them on the problem.
Like, I think feedlot, CAFO, beef, and livestock production is not the way to go.
unidentified
Right.
chris kresser
I think it can be environmentally destructive.
It's just from there, where they went with the solution is not where I go.
They go to plant-based vegan diet.
I go to regenerative, holistically managed livestock, you know...
Shifting the food production to smaller scale or at least shifting the method of plant production so it's less industrialized and doing things that actually can improve soil quality and sequester carbon from the atmosphere rather than scaling up more industry and more technology.
joe rogan
Well, I hope this acts as a guide for people that are confused by this, and I hope people recommend this, because this is probably as thorough a breakdown as anybody's ever done on that documentary.
And I just wish people would stop doing this.
I really wish they would just follow the actual science, even if it's inconvenient to their dogma.
And it's a real problem when people don't.
It really is, because it's confusing for folks, and there's a lot of people who suffer health consequences because of that confusion.
chris kresser
Well, it's a shame, too.
I know we've talked about this with Joel.
I think actually vegans and people who are recommending what we're talking about now have a lot in common.
You know, we want better methods of food production.
We care about the environment.
We care about animals and animal welfare.
We just reach different conclusions about, you know, from looking at those problems.
And we probably have more in common with the average American or person in the world who's just not even thinking about it at all, is eating processed and refined crap and doesn't care.
joe rogan
We have much more in common with the vegans.
The difference is these people, like the people that made this documentary and like Joel, they want to ignore evidence that flies in the face of what they're trying to promote.
And they do it with really frustrating and deceptive methods.
And that's what I thought when I watched this film.
It was hard for me to watch the whole thing.
I'd watched little clips of it before and I kind of had gotten a review of it and knew what it was all about.
But watching the whole thing, like sitting there going, what the fuck, man?
Come on.
chris kresser
I was on an airplane.
I told you this before.
Because I knew I had to be in an environment where I couldn't just run away and turn it off.
But I was like laughing out loud at parts and kind of like wanting to shout at others.
joe rogan
The boner part?
chris kresser
The boner part, the peanut butter and jelly, the peanut butter sandwich.
unidentified
Because you knew the difference.
chris kresser
Because I knew right off the bat, you know, there were just a lot of things that were funny, but sad.
joe rogan
Well, Chris, thank you for doing this, and James will have you on if you really want to do this.
chris kresser
He's game.
joe rogan
Okay.
Well, after this breakdown, I wonder how game he's still going to be.
chris kresser
Yeah, I wonder how game I'm going to be.
joe rogan
You let me know, okay?
Because you're the only guy for this job.
chris kresser
I'm running like seven and a half combined hours on this topic recently.
joe rogan
I know, but listen, you're doing the world a gigantic service.
unidentified
Thank you.
joe rogan
And I truly, truly appreciate it.
chris kresser
Well, thank you for having me on.
joe rogan
So please tell people one more time the website.
chris kresser
Cressor.co slash gamechangers for all the references, bibliography, studies, and the show notes.
joe rogan
Chris Kresser on Twitter and Instagram.
Why do I say Twitter that way?
Twitter.
Twitter and Instagram as well.
Same thing, right?
chris kresser
All those places.
joe rogan
Thank you, Chris.
chris kresser
Really appreciate you.
joe rogan
Thank you.
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