如果你真的相信了上面的话,看看这篇专家分析。
Microwave Ovens, Plastic Wrap and Dioxin
Part 2: Analysis
While some of the claims made in these emails are questionable at best, food safety experts do agree that consumers should take the following precautions when using plastic wrap or plastic containers in a microwave oven:
Only plastic containers or packaging labeled "Microwave Safe" should be used in microwave ovens.
If plastic wrap is used when microwaving, it should not be allowed to come into direct contact with food.
According to the U.S. Food and Drug Administration, chemical components can indeed "migrate" from plastics into food at microwaving temperatures. However, there is scant evidence to date, says the agency, that such contaminants pose a serious threat to human health.
Dioxins in plastic wrap?
Dioxins and dioxin-related compounds are pollutants that mainly enter the environment (and food supply) as industrial by-products. Particular dioxin compounds are considered to be highly toxic, with known health hazards ranging from birth defects to cancer.
Studies have shown that dioxins may be released into the atmosphere when chlorinated plastics such as polyvinyl chloride (PVC) ― which is a component of some plastic wraps and food packaging ― are incinerated at high temperatures, but there is no research demonstrating that dioxins are produced when the same plastics are heated in a microwave oven.
DEHA [Di(2-ethylhexyl)adipate]
DEHA is a "plasticizer" ― a softening compound added to plastic products to make them more pliable. It is an ingredient in some plastic wraps. Studies ― including the one initiated by high school student Claire Nelson (mentioned in one of the email texts above) ― have shown that DEHA can migrate into food.
At issue is whether or not it is toxic to human beings. The current scientific consensus is that it is not ― at least not in the minute amounts resulting from migration from plastics into foods.
Even though DEHA has long been regarded as a possible human carcinogen, the U.S. Environmental Protection Agency removed it from its list of toxic chemicals in the late 1990s after concluding, based on a review of the scientific evidence, that "it cannot reasonably be anticipated to cause cancer, teratogenic effects, immunotoxicity, neurotoxicity, gene mutations, liver, kidney, reproductive or developmental toxicity or other serious or irreversible chronic health effects."
Controversy
It must be noted that while the plastics industry and government health agencies in both the U.S. and Europe currently maintain that chemicals migrating into food from plastic wraps and containers pose no human health threat, consumer and environmental groups say otherwise. Both sides support their case by citing a lack of concrete evidence. The FDA argues that no studies have yet demonstrated toxic effects on humans; consumer advocates argue that not enough studies have been done.
Virtually all sources do agree on one important point: Consumers can and should protect themselves when using plastic products in the microwave by following the basic precautions stated above.