It is very safe to heat food with microwave oven, which can kill bacteria and viruses in food and keep more nutrients in food. As for the human body, as long as it is used properly, it will not cause any harm. Because the microwave oven is designed to meet strict safety standards, its radiation is less than that of mobile phones and computer monitors. However, the following foods cannot be heated in the microwave oven.

1. Don't heat the meat half-cooked. Because bacteria will still grow in semi-cooked food, because the time is short, it is impossible to kill all bacteria by microwave heating for the second time. Frozen meat must be thawed in the microwave oven before it is heated and cooked.

2. Avoid freezing the meat thawed in the microwave oven again: Because the meat has been thawed in the microwave oven, the outer layer has actually been heated at a low temperature, and bacteria can reproduce at this temperature. Although freezing can prevent its reproduction, it can't kill the living bacteria. If the meat thawed in the microwave oven is frozen in the refrigerator again, it must be heated until it is fully cooked.

3, avoid fried food: because high-temperature oil will splash and cause fire. In case of accidental fire in the furnace, don't open the door, turn off the power first, and then open the door to cool down after the fire is extinguished.

4. Avoid overtime heating: food is thawed or heated in the microwave oven. If you forget to take it out, if it takes more than 2 hours, you should throw it away to avoid food poisoning.

5. Avoid using ordinary plastic containers: use special microwave oven utensils to hold food and put it in the microwave oven for heating. First of all, hot food will deform plastic containers. Second, ordinary plastics will release toxic substances, pollute food and endanger human health.

6. Avoid using metal utensils: As iron, aluminum, stainless steel, enamel and other utensils are put into the furnace, electric sparks will be generated when the microwave oven is heated, which will not only damage the furnace body, but also heat unfamiliar food.

7. Avoid using closed containers: use wide-mouth containers when heating liquids, because the heat generated by food heating in closed containers is not easy to dissipate, which makes the pressure in the containers too high and easily leads to blasting accidents. Even if you cook food with shells, you should pierce the shells with needles or chopsticks in advance to avoid bursting after heating, splashing out to pollute the furnace wall or hurting people.

8. Avoid putting the oven in the bedroom: At the same time, be careful not to cover the cooling window grille on the microwave oven with objects.

9. Avoid working in front of the microwave oven for a long time: After turning on the microwave oven, people should stay away from the microwave oven or at least 1 m away from the microwave oven.