Five kinds of food that should never be eaten overnight

Fried dishes contain oil and salt. After one night, the vitamins in the dishes are oxidized, causing the nitrite content to increase significantly. After entering the stomach, it turns into nitrite. Although nitrate is not a direct carcinogen, it is a major health hazard. After nitrite enters the stomach, under certain conditions it will generate a substance called NC (N-nitroso compound), which is one of the risk factors for gastric cancer.
1. Do not drink overnight boiled water

Boil tap water for 3 to 5 minutes. The content of harmful substances such as nitrite and chloride is the lowest, making it most suitable for drinking. Nitrite can form carcinogenic nitrosamines in the human body. Some experts have found that the nitrite content in boiled water is higher than that in raw water. Moreover, the nitrite content increases significantly if the water is boiled repeatedly for too long or for more than 24 hours. After boiling water has been left for 24 hours, the nitrite content is 1.3 times that of when it was just boiled. Residents of our country have the habit of drinking boiled water. It is best to drink it immediately after it is boiled or only drink boiled water of the same day. Also, do not drink water that has been boiled for too long.

2. Don’t eat braised food overnight

Braised food must be eaten on the same day and not left overnight. From a food safety perspective, this is unhygienic. Food experts remind that even if it is placed in the refrigerator, it is not absolutely "safe". Mold and psychrophilic bacteria are also easy to grow in the refrigerator.

3. Be careful when drinking overnight soup

It takes time to make soup, so people usually make a big pot and drink it slowly. However, if the leftover soup is left in an aluminum or stainless steel pot for a long time, chemical reactions are likely to occur and harmful substances will be released. It is recommended not to add seasonings such as salt to the soup base. Use a clean spoon to scoop out the cooked soup and drink it on the same day. If you can't finish it, it is best to put it in a glass or ceramic container and store it in the refrigerator. 4. Overnight Tremella cannot be eaten

Tremella soup is a high-end nutritional supplement, but once it is left overnight, the nutrients will decrease and harmful ingredients will be produced. Because both indoor-cultivated Tremella and wild-cultivated Tremella contain more nitrates. If they are left for a long time after being cooked, the nitrates will be reduced to nitrites under the decomposition of bacteria. When people drink this soup, nitrite will naturally enter the blood circulation. The red blood cells in the blood contain hemoglobin, which can carry a large amount of oxygen to meet the body's needs. However, nitrite has the opposite effect, causing the normal hemoglobin in the human body to be oxidized into methemoglobin, which loses the ability to carry oxygen and causes the body to lack normal hematopoietic function. 5. Seafood cannot be left overnight

Overnight foods that should not be eaten include fish, seafood, green leafy vegetables, cold dishes, etc. Fish and seafood are prone to produce protein degradation products after being left overnight, which can damage liver and kidney functions. Green leafy vegetables contain varying amounts of nitrates. If they are overcooked or left for too long, not only will the vegetables turn yellow and change their taste, but the nitrates will also be reduced by bacteria into toxic nitrites, which are carcinogenic. Since cold dishes are exposed to a lot of contamination during processing, even if they are refrigerated, they are likely to have gone bad overnight and should be prepared and eaten immediately.
Not only should you be wary of these five overnight foods, but you should also tell your family and friends not to ruin your health for the sake of saving money!

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