Generally, the dishes and rice are cooked the night before and put in the refrigerator, and then heated in the microwave at noon the next day. Will it be bad to eat them for a long time? Is there nutrition? Overnight vegetables will produce harmful substances, and long-term consumption is not conducive to human health.

"Overnight dishes" does not only refer to dishes that have been left overnight. If they are left for more than 8-10 hours, they should be considered overnight.

There are two reasons for the increase of toxic components in food. The first reason is that chemicals in food produce carcinogens, such as nitrite, which cannot be removed even if heated. Another reason is the secondary pollution caused by foreign bacteria when it is placed.

Extended data:

1, overnight green leafy vegetables

Because some green leafy vegetables contain more nitrates, if they are left for too long after cooking, nitrates will be reduced to nitrite under the decomposition of bacteria, which is carcinogenic and cannot be removed by heating.

2. Overnight seafood damages liver and kidney.

Seafood such as crabs, fish and shrimps will produce protein degradation products overnight, which will damage the liver and kidney function. If you really buy too much, you can pack raw seafood in fresh-keeping bags or boxes, freeze it in the refrigerator and cook it next time.

3. It is dangerous to put eggs for a long time.

Many people like to eat soft-boiled eggs, but this kind of eggs is not completely sterilized, and the eggs are rich in nutrition, which is particularly easy to breed bacteria and will be dangerous after eating. If the eggs are ripe and well preserved in a low-temperature seal, it is no problem to eat them overnight.

4, tremella mushrooms should be careful

Whether it is wild or cultivated tremella, mushrooms, etc., it is easy to leave a lot of nitrate. If you leave it for a long time, you can only reluctantly throw it away.

5. Overnight soup is harmful to health

Don't put the soup in the metal container. Boiling soup is time-consuming and laborious. People often boil a large pot and eat it for several days in a row. If the leftover soup is kept in aluminum pot and iron pot for a long time, it will precipitate substances harmful to human body.

6. You can't drink overnight tea

Most of the vitamins in overnight tea have been lost because of too long time, and protein and sugar in tea soup will become nutrients for bacteria and mold reproduction.

References:

People's Network-How to deal with the harm of eating overnight dishes without wasting them