Overnight dishes also need to be divided into different dishes. Some overnight dishes are edible. If some dishes are not handled properly, it is best not to eat them after overnight. Of course, no matter how it is handled, overnight dishes are definitely not as good as fresh ones. Let's look down specifically

First, the harm of nitrite to human body

The main problem of overnight dishes is nitrite. Vegetables contain nitrate, which is harmless to human body, but it is easily reduced to nitrite by bacteria. Eating too much will do some harm to the body, so that the blood can't transport oxygen, and the lips and fingertips will turn blue, which is also commonly known as "cyanosis". Long-term use will seriously lead to hypoxia in the brain and even lead to esophageal cancer and gastric cancer. If the leftovers are not stored properly, bacteria will multiply and harmful nitrite will become popular.

The truth is such a truth, but the actual situation is not necessarily so scary.

Second, not all leftovers contain high nitrite.

Not all leftovers will be caught. The nitrate content of fish and bean products is very small, so if the leftovers are fish, meat and bean products, the problem of nitrite is basically not considered, and it is more important to consider reasonable storage to avoid microbial reproduction. Vegetables such as beans, cucumbers, tomatoes and onions have low nitrate content, so there is no need to worry about nitrite. Spinach, leek, celery and radish all have this concern.

Third, learn to deal with leftovers and further reduce the nitrite content.

Fan Zhihong, a nutrition expert, once did an experiment: if you don't turn it over after cooking and put it in a refrigerator at 4 degrees, the nitrite content of green leafy vegetables such as spinach will rise from 3mg/kg to 7mg/kg after 24 hours. The human body may be poisoned if it eats 0.2g nitrite, and it needs to eat nearly 30kg spinach one night. Obviously, this is impossible. Therefore, if you reserve a part in advance after cooking, put it in the refrigerator after it is completely cooled, and then eat it after reheating the next day, you basically don't have to worry about nitrite.

Of course, food is best cooked and eaten on the same day, and fresh vegetables are definitely the best. No matter how nutritious the food is, no matter how delicious the food is, it will not only be harmful to health, but also taste much worse if it is left for a long time.