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Dec. 25, 2007 - Skeptoid
15:01
Skeptoid #80: Are Microwave Ovens Safe?

An examination of the various claims that microwaved food and water are poisonous. Learn about your ad choices: dovetail.prx.org/ad-choices

Transcriber: nvidia/parakeet-tdt-0.6b-v2, sat-12l-sm, and large-v3-turbo
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Time Text
Testing Microwave Myths 00:05:34
Misinformation about microwave ovens is everywhere.
Some say the devices themselves destroy the tissue of anyone nearby.
Some say that any food cooked in a microwave either becomes instantly poisonous or loses all nutritional value.
Could there be any truth to any of this?
Is the way a microwave heats food really so strange as to cause any such effects?
What's coming up next on Skeptoid?
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You're listening to Skeptoid.
I'm Brian Dunning from Skeptoid.com.
Death in your kitchen.
Microwave ovens.
Today, we're going to walk on the wild side and eat some microwaved food.
You've never really lived until you've lived dangerously, so let's put our lives on the line by testing the claims that microwave food and water are toxic.
First, a little background info.
Microwave ovens work by passing microwave-band electromagnetic radiation over the food at 2.5 gigahertz.
Molecules that are electric dipoles, of which water is the most efficient, rotate back and forth in this field.
The friction between them creates heat.
This is called dielectric heating.
More complex molecules, which are not as clearly dipolar, are not affected.
It's an efficient and clean way to heat food.
I first learned about the claims of danger from a chain email sent by a friend of mine who tends to believe anything that's anti-establishment or on the fringe.
A few internet searches of some keywords reveal a huge number of holistic, organic, and other alternative websites repeating these same claims.
Just to give you a flavor of how far out these stories are, give a listen to this list of 10 reasons to throw out your microwave oven.
As I read these off, notice that not one of them makes a specific or testable claim.
They are all merely scary sentences constructed using scientific sounding words.
And as you can tell from the brief description of how microwaves work, few of these have any remote connection to fact.
Number one, continually eating food processed from a microwave oven causes long-term, permanent brain damage by shorting out electrical impulses in the brain, depolarizing or demagnetizing the brain tissue.
Number two, the human body cannot metabolize the unknown byproducts created in microwave food.
Number three, male and female hormone production is shut down and or altered by continually eating microwaved foods.
Number four, the effects of microwave food byproducts are permanent within the human body.
Number five, minerals, vitamins, and nutrients of all microwave food is reduced or altered so that the human body gets little or no benefit, or the human body absorbs altered compounds that cannot be broken down.
Number six, the minerals and vegetables are altered into cancerous-free radicals when cooked in microwave ovens.
Number seven, microwave foods cause stomach and intestinal cancer tumors.
This may explain the rapidly increased rate of colon cancer in America.
Number eight, the prolonged eating of microwaved foods causes cancerous cells to increase in human blood.
Number nine, continual ingestion of microwaved food causes immune system deficiencies through lymph gland and blood serum alterations.
Number 10, eating microwaved food causes loss of memory, concentration, emotional instability, and a decrease of intelligence.
One clue that might encourage you to regard these claims with some skepticism is the fact that ever since microwave ovens came on the market in 1954, not one person has ever exhibited a single symptom of any illness resulting from having eaten microwaved food or from having used water that had been microwaved.
Burns are the exception, but burns are caused by heat from any source.
That's not unique to microwaves.
But if you believe the claims by the anti-microwave fringe, whom I call the microwave militia, practically everyone on the planet should be gravely ill with cancer, radiation poisoning, malnutrition, and mental retardation.
The same chain email and many of these websites also state that giving a plant water that has been microwaved will kill it.
The Microwave Militia Exposed 00:07:23
There's even a series of unsourced photographs of two plants, one of which withers and dies while its sibling flourishes.
The awesome website Snopes.com tested this particular claim.
They took three plants of each of several types and watered one with tap water, one with water that had been boiled over a stove, and the third with water that had been boiled in a microwave.
Unlike whoever took the pictures that often accompany the chain email, Snopes actually controlled for other variables.
I'm sure you won't have to stretch your imagination very far to guess how the plants did.
They all did exactly the same.
Snopes has complete details and photographs on their website.
Somehow these plants managed to escape the guaranteed death sentence that believers say microwaved water carries.
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This whole paranoid suggestion is based on the presumption that a microwave oven somehow changes or poisons water.
If true, wouldn't you be able to perform some kind of a test on water and see if it has ever been microwaved?
Water is H2O, whether it's ever been microwaved or not.
But here's an even deal for you.
If you truly believe that H2O carries some permanent damage as a result of being microwaved, and that it's possible to detect this damage through any means you choose, there's a million dollars in it for you.
As you may know, the Skeptoid podcast is a qualifying media outlet for the James Randi Educational Foundation's Million Dollar Paranormal Challenge.
I'll walk it through for you, and I'll become your biggest cheerleader.
Are microwaves really a danger to humanity?
If so, it would be immoral for you to do anything else but take that million dollars and use it to educate and save the world.
Probably the most flagrant error that the microwave militia propagates is that microwaved food or water contains what they call radiolytic compounds, new chemicals created by the tearing apart of molecules in a microwave.
These new chemicals are said to be dangerous, cancerous, radioactive, unnatural, or otherwise harmful.
This is a demonstrably false claim.
Radiolysis, which is a real process and which the militia believes creates these radiolytic compounds, is the process by which molecules are dissociated under ionizing radiation.
Water can be dissociated under ionizing alpha particle bombardment, which is a natural process.
Microwave radiation, as mentioned earlier, is not ionizing radiation.
It is thus scientifically incapable of causing radiolysis.
The differences between microwave radiation and alpha radiation are huge.
With the claim that microwaves cause dissociation of water molecules, the microwave militia is either deliberately lying or they are grossly ignorant of the very subject on which they claim superior expertise.
Swiss vegetarianism advocate Dr. Hans Hertel is perhaps the most vocal of the microwave militia fringe group.
He is quoted in virtually every book written on alternative foods or holistic health.
A top-selling book on Amazon called Perfect Balance by an author known simply as Atrea writes, In spite of the political pressure, Hertel has continued his studies and won the support of many other scientists in Europe for his findings and methodology.
Hertel concludes that microwaved food alters the blood chemistry of people who eat it.
The manufacturing companies are trying to keep this information suppressed through court orders.
Dr. Hertel seems to have managed to gain this claimed following even without producing the most basic of information that prospective groupies should request.
A specific, testable claim about what this change in blood chemistry might be, or a single victim.
He is best known for his most publicized test.
In 1989, he and seven fellow vegetarians confined themselves to a hotel and consumed only milk and vegetables, prepared in different ways, for two months.
When he emerged, he announced his results that microwave ovens cause cancer and degenerative diseases.
despite no cases of cancer or illness among he or his group.
His research, if you want to call it that, was never peer-reviewed or published in any reputable journal, and yet it has become the foundational magnum opus of the anti-microwave agenda.
You'll also find that there are a large number of studies out finding changes to the nutritional content of food that has been microwaved, and the microwave militia loves to point to these.
Chemical reactions happen whenever any food is cooked.
So this has more to do with cooking than with the cooking method.
Moreover, such changes are generally well below any perceptible threshold and have always been found to be safe.
The microwave militia also makes claims such as microwave ovens are illegal in Russia or other parts of Europe.
This is just a straight-up lie.
Microwaves are perfectly legal in Russia and everywhere else in Europe.
In fact, I was not able to find a single country in the world that bans microwave ovens.
They're regulated, of course, like all electrical appliances, but regulation should not be mischaracterized as a ban.
Why Microwaves Are Safe 00:02:00
So what's the sum total of our evidence?
Billions of people have been eating microwaved food for decades with no ill effects and no plausible expectation of ill effects.
The best evidence put forward by anti-microwave activists is based on shameless lies and irresponsibly bad science.
Thus, a truly skeptical process leads us to the conclusion that there's nothing at all wrong with microwaving your food.
However, I'm drinking coffee right now made from microwaved water, and it's entirely possible that this has caused profound mental aberration and made me spout nonsense.
You're listening to Skeptoid.
I'm Brian Dunning from skeptoid.com.
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