Vegetables contain a lot of nitrate obtained from growing soil and irrigation water. Fresh vegetables or cooked vegetables, if left too long, will be reduced to nitrite under the decomposition of bacteria.

When people drink this vegetable soup, the nitrite in the soup will enter the gastrointestinal tract and enter the blood after absorption. Red blood cells in normal blood have a substance called hemoglobin, which can carry a lot of oxygen for the body. However, nitrite can oxidize ferrous iron in normal hemoglobin into ferric iron, which leads to methemoglobinemia in human body and makes red blood cells lose their oxygen-carrying ability, which will lead to hypoxia symptoms and even death in severe cases.

In addition, because nitrite is a strong carcinogen, drinking this soup for a long time or even overnight is likely to increase the risk of gastric cancer and rectal cancer.

Extended data:

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.

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!

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