Five kinds of food can't be heated repeatedly in the microwave oven: it will be a big problem to heat chicken in the microwave oven, because the microwave oven can't heat evenly, so it will heat some areas first. Protein density of chicken is also higher than that of other red meats, so when it is reheated, if protein decomposition is inconsistent, it will cause gastrointestinal discomfort. Therefore, in order to ensure uniform heating, the chicken should be turned over frequently.
Rice: The storage of rice is more important than secondary heating. If it is only stored at room temperature, it will easily lead to bacterial reproduction, toxin production, vomiting or diarrhea, and even secondary heating can not eliminate the toxin.
Potatoes: potatoes should also be stored, otherwise it will easily lead to a large number of bacteria. If potatoes are stored at room temperature, especially when oxygen is combined with tin foil, it is easy to breed Botox. Even if it is heated twice, it can't be sterilized and needs to be stored in cold storage.
Mushrooms: The protein of mushrooms is easily destroyed by enzymes and other microorganisms, so if the storage method is incorrect, reheating will cause gastrointestinal discomfort. However, if it is stored in the refrigerator for less than 24 hours, it can be heated to more than 70 degrees.
Spinach and other leafy vegetables: due to the influence of growing environment, spinach and other leafy vegetables may contain higher nitrate concentration. Although nitrate is harmless, it can be converted into carcinogenic nitrosamines. Nitrosamines can affect the oxygen carrying capacity of blood and the health of children. Therefore, it is recommended that spinach should not be heated twice.
Can microwave heating cause cancer? The principle of microwave heating is only physical heating. This heating method itself heats the food from the inside out, but it does not cause chemical changes in the food. It causes friction and vibration among molecules in food through microwave radiation, and generates heat. So microwave heating will not produce so-called carcinogens.
However, if the microwave oven is improperly used, such as stainless steel, plastic bowls or other containers that are not suitable for microwave heating, carcinogens may be produced due to improper materials, but this is not the problem of the microwave oven, and the responsibility should not be attributed to the microwave oven.
Description of microwave heating food: pregnant women and babies should eat as little as possible by microwave heating. It is best to heat the meat with water. Don't heat it to half heat in advance, and then heat it in the microwave oven until it is fully cooked. Although this can shorten the cooking time before meals, the bacteria in the semi-cooked food are not killed, and even if they are put in the refrigerator, the bacteria will still grow.
It is best not to heat the food in the microwave oven for more than 8 hours. When you heat it in the microwave for the second time, you may not be able to kill all the bacteria and eat your stomach because the time is too short. Therefore, if busy family chefs want to save cooking time, they still cook the meat and put it in shallow containers.
When heating, in order to prevent water loss, you can cover the lid slightly, pack the frozen food in plastic bags, freeze it, thaw it in the refrigerator or microwave oven and then heat it.
Don't heat the rice in the microwave for too long, it takes about two minutes. Don't use ordinary plastic containers for microwave heating. Although the plastic itself is not heated, hot food will make the container very hot. These plastic containers may release toxins and pollute food at high temperature.