I’ve looked for solid information on microwave cooking a few times and found very little. I recently learned of an interesting article by Ryan Andrews, RD at Precision Nutrition which he posted last March and thought I’d pass it on:

All About Microwave Cooking

Not being completely clear on his conclusion, I wrote Ryan and he confirmed that the take-home message is that it’s safe to microwave your food as far as the food goes, but you should stand a few feet away from the microwave oven when it is on to prevent any accumulation of radiation entering your body.