Ingredients that cannot be eaten overnight:
1, can't drink boiled water overnight: tap water is boiled for 3 ~ 5 minutes, with the lowest content of harmful substances such as nitrite and chloride, which is most suitable for people to drink. Drink less boiled water overnight: Nitrite can form carcinogenic nitrosamines in human body. Some experts have found that the nitrite content in boiled water is higher than that in raw water. In addition, if the boiling time is too long or repeated for more than 24 hours, the nitrite content will increase obviously. After standing in boiling water for 24 hours, the nitrite content is 65438 0.3 times higher than that when it was just boiled.
2, eggs can not be eaten overnight: if the eggs are not completely cooked, immature yolk will be eaten overnight. In the case of improper preservation, nutritious things are easy to breed bacteria and harmful to health. However, if (eggs) are mature and properly sealed at low temperature (generally refrigerated temperature), they can generally be preserved for 48 hours. Whether eggs can be eaten overnight depends not only on whether they are heated, but also on whether they are cooked when they are first cooked. Only after the eggs are cooked for the first time can they be cooked overnight. This is also the truth of tea eggs.
3. Overnight tea can't be drunk: Overnight tea has lost most of the vitamins because of too long time, and protein and sugar in tea soup will become nutrients for bacteria and molds to multiply. So people usually think that overnight tea can't be drunk.
4. Tremella fuciformis can't be eaten overnight: Tremella fuciformis soup is an advanced nutritional supplement, but once it is overnight, the nutritional components will be reduced and harmful components will be produced. Because both the tremella cultivated indoors and the tremella cultivated in the wild of basswood contain more nitrate, if cooked for a long time, the nitrate will be reduced to nitrite under the decomposition of bacteria. When people drink this soup, nitrous acid naturally enters the blood circulation. Red blood cells in the blood contain hemoglobin, which can carry a lot of oxygen for the body's needs. Nitrite, on the other hand, has the opposite effect, oxidizing normal hemoglobin in human body into methemoglobin, losing its oxygen-carrying ability, leading to the loss of normal hematopoietic function in human body.
5, do not eat leafy vegetables overnight: Because some leafy vegetables contain more nitrate, if they are cooked for too long, nitrate will be reduced to nitrite under the decomposition of bacteria, which is carcinogenic and cannot be removed by heating. Usually, the nitrate content of stem and leaf vegetables is the highest, while that of melon vegetables is slightly lower, and roots and cauliflower are in the middle. Therefore, if you buy different kinds of vegetables at the same time, you should eat stems and leaves first, such as Chinese cabbage and spinach.
6. Don't eat spoiled home cooking overnight: Many citizens also like to put leftover spoiled home cooking in the refrigerator for the night, but this practice has great food safety hazards. To prevent food poisoning, don't eat rotten goods braised overnight in spring and summer. Bulk braised pork should be eaten on the same day, not overnight. From the perspective of food safety, this is unsanitary. If possible, it is best not to eat bad goods overnight. Food experts warn that even the food in the refrigerator is not absolutely "safe". Refrigerators are prone to mold and psychrophilic bacteria.
7, seafood can not be overnight: foods that are not suitable for overnight are fish, seafood, green leafy vegetables, cold salad and so on. Fish and seafood can easily produce protein degradation products overnight, which will damage liver and kidney function. Green leafy vegetables contain different amounts of nitrate. If it is overcooked or left for too long, not only will vegetables turn yellow and taste bad, but nitrate will also be reduced to toxic nitrite by bacteria, which will cause cancer. Cold salad is polluted when it is processed. Even if it is refrigerated, it may have gone bad after a night, so it should be cooked and eaten now.
8, overnight soup can not stay overnight: many people always like to put the soup in the refrigerator, boil it the next day before drinking. Healthy diet: The best way to preserve the soup base is not to put seasonings such as salt. After the soup is cooked, scoop 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. Because the leftover soup is stored in aluminum pot and stainless steel pot for a long time, it is prone to chemical reaction, so it should be kept in glass or ceramic utensils.
A lot of overnight food is not suitable for eating, so we should pay more attention in our life and try to eat less overnight food, which is not only bad for our health, but also may cause serious harm, not worth the loss.