Answer to Question #1913 Submitted to "Ask the Experts"

Q

I understand microwaves are better to cook with than stoves, however, I heard that microwaves can cause cancer. Is this in any way true, or are there any harmful effects caused by the use of them?

A

The thermal heating effect of microwaves is well understood and is the basis for the heating action of microwave ovens. Some studies have examined the possibility of a link between microwave exposure and cancer. Results to date have been inconclusive. While some experimental data have suggested a possible link between microwave exposure and cancer, other studies have been unable to replicate these findings. In fact other studies have failed to find evidence for a causal link to cancer or any related condition. For more information about bioeffects of microwaves and radiofrequency energy see the Federal Communications Commission. Modern day microwave ovens are regulated as radiation-emitting electronic products by the Center for Devices and Radiological Health of the Health and Human Services Administration. The allowable leakage level (5 milliwatts per square centimeter at two-inches distance) for microwaves outside commercial microwave ovens is set at a low level generally believed to be safe for human exposure.

Gary Zeman, ScD, CHP