Auricularia auricula soup is an advanced nutritional supplement, but after a night, 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.

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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.

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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!

2. Don't drink overnight tea.

After staying overnight for a long time, most of the vitamins are lost, and the protein and sugar in the tea soup will become nutrients for bacteria and mold. So people usually think that overnight tea can't be drunk.

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3. What about overnight soup?

Cantonese people like to make soup. Put the soup in the refrigerator and cook it the next day. Is this overnight soup good for your health?

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.

4, seafood can not be overnight.

Overnight foods that are not suitable for eating include fish, seafood, green leafy vegetables and cold salad.

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.

Don't eat bad home cooking overnight.

Pot-stewed and rotten vegetables are both popular seasonal dishes in Shanghai. Many citizens also like to put the leftover stewed and spoiled food in the refrigerator for the night, but this practice has great food safety hazards.

To prevent food poisoning, don't eat inferior 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.

6. Don't eat leafy vegetables overnight!

Because some green leafy vegetables contain more nitrate, if they are left for too long after cooking, 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.

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.

7. Can't you eat eggs overnight?

Northerner: Yes, I didn't see tea eggs on the street! [spoof, strongman uses eggs to make RMB]

Southerner: No, especially men, because you will get intestinal gas and scrotum swelling!

Scientist: Not necessarily! Because if the egg is not fully cooked, the immature yolk will be eaten overnight. Nutritious things can easily breed bacteria if they are not properly preserved, which is harmful to the body, such as gastrointestinal discomfort and flatulence. However, if the food (eggs) is cooked and properly sealed at low temperature (usually refrigeration temperature), it can generally be preserved for 48 hours.

From the tips of scientists, we can know that whether eggs can be eaten overnight depends not only on whether they are heated, but also on whether they are cooked for the first time. Only after the first boiled egg is cooked, it is no problem to cook it overnight.

This is also the truth of tea eggs. Maybe you don't know that tea eggs are cooked twice. Boil it for the first time, crush it for the second time, and then cook it with tea and other auxiliary materials. So tea eggs must be boiled. Now some people like to eat soft-boiled eggs. That kind of egg can't be eaten overnight. Don't eat it even if it is cooked for the second time.

8. Can't you drink boiled water overnight?

Boil tap water for 3 ~ 5 minutes, the content of nitrite, chloride and other harmful substances is the lowest, 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.

China residents have the habit of drinking boiled water, and it is best to burn it now or only drink the boiled water of the day. Don't drink boiled water for too long.