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    Home > Food News > Food Articles > Eating overnight silver ears can lead to nitrite poisoning?

    Eating overnight silver ears can lead to nitrite poisoning?

    • Last Update: 2021-02-20
    • Source: Internet
    • Author: User
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    Silver ear has been regarded as a tonic, wherein the rich silver ear polysaccharin (about 70% of the dry weight) is to prove the nutritional value of silver ear "killer", beauty, enhance immunity all rely on it. However, some preliminary studies on silver ear polysaccharies do not confirm the powerful "magic" effects of polysaccharies, and a lot of further research is needed.but the silvery ears are smooth and smooth, and it's good for dessert or late at night. But now eat now stew is too much trouble, how to do? How fast and save the amount of stew for a few days at a time! What the? "Don't eat overnight silver ear soup!" Silver ears contain nitrates, which are broken down into nitrites by bacteria overnight. Nitrites are not only easy to cause poisoning, but also increase the risk of stomach cancer! "If you look at the recent milk poisoning incident, nitrites can be fatal!"the message true or another rumor?Where do nitritesNitrates and nitrites are not unique to silver ears, plants grow using natural nitrogen to synthesize amino acids, in the process will inevitably produce nitrates, and some of the reductase in the plant will reduce some nitrates into nitrites. Therefore, all plants contain nitrates and nitrites. And all of our daily diets inevitably contain nitrates and nitrites.nitrate itself is non-toxic, but it is reduced to nitrite, a large number of into the human body, will lead to "high-speed hemoglobin disease." Nitrites oxidize the priceless iron in hemoglobin into triethic iron, causing hemoglobin to lose its ability to carry oxygen, causing hypoxia in the body and, in severe cases, death. As for cancer, it's the nitrite-converted nitrosamine problem. Nitrosamines are recognized as carcinogens.In view of the nitrites in the silver ear overnight given that there is only data on the wood ear in the literature, and the nutritional content of the wood ear and the silver ear is very close, it is also more reliable to use the wood ear data as a reference. The nitrate content in fresh wood ears is 120 mg/kg and the nitrite content is about 2.5 mg/kg, both well below the standards of the Food and Agriculture Organization of the United Nations (the nitrate content of fresh vegetables is less than 432 mg/kg, and the nitrite content of pollution-free vegetables is less than 40 mg/kg). And the vast majority of commercially available silver ears are dry products, fresh silver ears into dry products in the process, nitrates, nitrites will also have losses, higher safety.Dry silver ear before consumption needs to bubble, nitrates and nitrites are very soluble in water, after water, soaking, silver ear cell membrane will be broken, these trace nitrates, nitrites will also run into the water. Therefore, when eating silver ears, wood ears, it is best to rinse with running water a few more times, and then interval water immersion 1-2 hours.the nitrates in the overnight silver ear be reduced to nitrites by bacteria, causing a surge in nitrite levels? As long as it is well preserved (closed refrigerator refrigeration), the fruit shell healthy certainly tell everyone: No. Or take mule as an example, at room temperature, overnight boiled wood ear Central Asian nitrate content rose from 2.19 mg/kg to 2.59 mg/kg, which is much less than 200 mg of poisoning dose (note that the unit is kg ah, kg!). )。 In theory, silver ears are similar, and silver ears themselves do not contain nitrate reduction bacteria. In addition, it can also be soaked in the refrigerator to reduce the harm.nitrite levels are already very low, and less nitrosamines are converted into the body. The occurrence of cancer is the result of a multi-factor effect, not just nitrosamines. Even if you eat a bowl of silver ears in the morning and evening, the amount of nitrite you eat into your body is not as much as a ham intestine! (Sodium nitrite is a commonly used preservative in the meat industry, and according to existing technology, the legal dosage is not harmful to the human body.) )silver ear shopping tips: white silver ears can not eat! Fresh silver ears naturally dry after beige, the root color is slightly darker. In order to extend the shelf life, sulfur fumigation is often used in the silver ear air-drying process, but this will make the silver ear blades fold, the taste becomes brittle, more worrying is the problem of sulphate residue exceeding the standard. Excessive intake of sulphates is very harmful to the gastrointestinal and liver of the human body! Therefore, choose silver ears, not the whiter the better, silver ears were originally yellow skin ah!:Xinmei. Chinese Edible Fungi Cultivation. Beijing Agricultural Press 1995: 67-69.
    Qilin, Li Xia. Wood nitrate, nitrite content analysis, modern preventive medicine, 2008, (3217): 3286-3287.
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