英文讨论

Microwaves heat food by causing water molecules in it to resonate at very high frequencies and eventually turn to steam which heats your food. While this can rapidly heat your food, what most people fail to realize is that it also causes a change in your food's chemical structure.

There are numerous issues that have emerged since microwave ovens were first introduced to consumers more than 40 years ago, besides depleting your food's nutritional value, which will be addressed a bit later.

The first thing you probably noticed when you began microwaving food was how uneven the heating is.

"Hot spots" in microwaved food can be hot enough to cause burns--or build up to a "steam explosion." This has resulted in admonitions to new mothers about NOT using the microwave to heat up baby bottles, since babies have been burned by super-heated formula that went undetected.

Another problem with microwave ovens is that carcinogenic toxins can leach out of your plastic and paper containers/covers, and into your food.

The January/February 1990 issue of Nutrition Action Newsletter reported the leakage of numerous toxic chemicals from the packaging of common microwavable foods, including pizzas, chips and popcorn. Chemicals included polyethylene terpthalate (PET), benzene, toluene, and xylene. Microwaving fatty foods in plastic containers leads to the release of dioxins (known carcinogens) and other toxins into your food. [8] [2]

One of the worst contaminants is BPA, or bisphenol A, an estrogen-like compound used widely in plastic products. In fact, dishes made specifically for the microwave often contain BPA, but many other plastic products contain it as well.

Microwaving distorts and deforms the molecules of whatever food or other substance you subject to it. An example of this is blood products.

Blood is normally warmed before being transfused into a person. Now we know that microwaving blood products damages the blood components. In fact, one woman died after receiving a transfusion of microwaved blood in 1991 , which resulted in a well-publicized lawsuit.