1, green leafy vegetables are the most dangerous overnight. Usually, the nitrate content of stem and leaf vegetables is the highest, melon vegetables are slightly lower, and roots and cauliflower are in the middle. Therefore, if you buy a lot of vegetables at the same time, you should eat leafy vegetables, such as Chinese cabbage and spinach. If you are going to cook more vegetables and eat them hot the next day, try to make fewer stem and leaf vegetables and choose melons.
2. Overnight seafood damages liver and kidney. Seafood such as crab, fish and shrimp will produce protein degradation products overnight, which will damage the function of liver and kidney. If you really buy too much, you can put raw seafood in a fresh-keeping bag or box, freeze it in the refrigerator and cook it next time.
3, half-cooked eggs are easy to cause disease. Many people like to eat half-cooked 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 to eat. If the eggs are cooked and well preserved under low temperature sealing, it is no problem to eat them overnight.
4, tremella mushrooms should be cautious. 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.
Don't put the soup in a metal container. Boiling soup takes time and effort. People often cook a large pot and eat it for several days. If the leftover soup is left in aluminum pot and iron pot for a long time, it will precipitate substances harmful to human body. The best way to preserve soup is not to put seasoning such as salt in the soup. After the soup is cooked, put out what you want to drink that day with a clean spoon, and it is best to store it in the refrigerator with a clay pot or a fresh-keeping box.
Extended data:
Storage skills of overnight vegetables:
1. Cryopreservation: It can inhibit the growth and reproduction of microorganisms, inhibit the activity of nitrate reductase and reduce the production of nitrite when stored in a refrigerator at 4 degrees. Many literatures have studied the effects of storage time and storage conditions on nitrite content of vegetables, and the conclusion is that cold storage can greatly reduce nitrite production.
2. Don't turn it over: put out the inedible dishes in advance and store them in the refrigerator instead of turning them over for a long time. The more vegetables are turned over, the greater the chance of being infected with microorganisms. This can well control the generation of nitrite and ensure the safety of leftovers.
3. Reduce storage time: Because the process of reducing nitrate to nitrite by nitrate reductase in microorganisms is essentially a biochemical reaction, the longer the storage time, the more nitrite will be produced. So don't leave the dishes overnight for too long, and solve them as soon as possible.
Leftovers are best placed in glass containers: overnight dishes are not equal to disasters. As long as it's not kept for too long and eaten frequently, there's no need to talk about it. Nitrate and nitrite in food are not harmful to human body.
Of course, in order to minimize the impact of harmful substances on the body, it is best to seal the remaining cooked food in the refrigerator with glass or porcelain utensils. When the food in the refrigerator is eaten again, it should be heated thoroughly with high temperature. It's best to buy fresh meat and eat it at once. If you can't use it all at once, you'd better put it in the refrigerator for freezing. This is the best way to preserve fresh meat.
It should be noted that the leftovers mentioned above do not include cooked seafood, seafood and cold salad. Cooked fresh seafood and seafood stored for a long time are prone to produce protein degradation products, damage liver and kidney functions, and even produce toxins. Cold salad is easy to deteriorate even if it is refrigerated because there is more pollution.
5, thorough heating: the leftovers of the second meal are ok, but must be thoroughly heated. The so-called thorough heating means that the whole dish is heated to 100 degrees and kept boiling for more than 3 minutes. It is a good way to heat the leftover food in the microwave oven, which can fully heat the inside of the food.
References:
People's Network-Can I eat overnight dishes? Never eat five overnight dishes.
People's Network-Can't you eat cancer-causing overnight dishes? Teach you five skills to store overnight dishes.