People often use microwave ovens to heat food. Some people think that heating in a microwave oven changes the molecular structure of food and produces molecules that the human body cannot recognize. These strange formulas are unacceptable to the human body, and some are toxic and may even cause cancer. 
people or animals who often eat microwave food will have serious physiological changes in their bodies, resulting in serious health problems.
Microwave only heats the water molecules in food, and there is no chemical change in food.