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    Home > Food News > Food Articles > Can mushrooms be eaten "rich in heavy metals"? Listen to what the experts have to say.

    Can mushrooms be eaten "rich in heavy metals"? Listen to what the experts have to say.

    • Last Update: 2020-09-29
    • Source: Internet
    • Author: User
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    Original title: Can mushrooms be eaten "rich in heavy metals"?
    are an indispensable partner in a diverse diet, but recently the mushroom family has fallen out of favor with a news message. A doctor who claims to have traveled to the Pathology Institute of the University Hospital zurich has come into contact with a doctor who studies fungi. According to the doctor revealed that mushrooms can not eat more, can eat up to 200 grams per month, because mushrooms rich in heavy metals is particularly strong, almost all heavy metals, such as lead, mercury, nickel will be rich in mushrooms, but the human body does not discharge the mechanism of heavy metals, long time, these heavy metals will gather in the kidney tube, in severe cases can even cause nephrosis of the tube.
    's the truth? It's better to listen to expert analysis and the results of scientific experiments.
    soil pollution is the source
    "some mushrooms can be rich in heavy metals" is an objective fact, and the degree of abunding mainly depends on the degree of soil pollution.
    yun, a member of the expert group of the food and nutrition information exchange center, pointed out in an interview that there have been some studies at home and abroad that have reported examples of excessive heavy metal content in specific areas and types of mushrooms, which may be related to the contamination of soil and water sources in the region, which is an important industrial base.
    but mushroom-rich heavy metals are only a self-protection mechanism for poor growth environment, not the inevitable result of mushroom growth. They are not essential nutrients for mushroom growth and do not promote mushroom growth. Therefore, in the cultivation, there will be no illegal traders artificially added.
    Yunyun heartlessly said, in general, the growth conditions of wild mushrooms are not monitored, heavy metal content is often higher than artificial cultivation;
    , in soil-contaminated areas, we can't just eat wild mushrooms. In contrast, farmed mushrooms grow on a cultured base made of cottonseed shells, straws, wood segments, etc., and are safer to eat without touching contaminated soil.
    Fan Zhihong, an associate professor in the Department of Nutrition and Food Safety at the School of Food Science at The Agricultural University of China, also said that mushrooms have the ability to be rich in heavy metals, but that there are still enough heavy metals in the culture base or soil for it to be rich before the consequences of exceeding the standards occur. Mushrooms themselves do not produce heavy metal elements out of the air. In other words, where the environment is good, mushrooms are safer. Therefore, to protect the environment is to protect our own food safety.
    N't worry about normal consumption
    In fact, from some tests and experiments on the content of heavy metals in edible bacteria, it is not difficult to find that in the pollution-free soil artificial cultivation of edible bacteria almost no rich in heavy metals.
    , for example, an experiment showed that mushrooms, anchovies, golden needle mushrooms, wood ears and other edible bacteria on the rich effect of lead is not obvious. Even when lead is added to 100 mg/kg of culture, the levels of lead in these edible fungi entities are only 1.5 times higher than those in cultured sub-entities that do not add lead, compared with 0.7 times in general.
    And researcher Giuliano Bressa's experiments on brown skin side ears (commonly known as mushrooms) found that the concentration coefficient of brown skin side ears cultivated on artificial piles containing mercury can reach 65 to 140, with a maximum concentration of 23.2 mg/kg. However, when the concentration of mercury in the culture is higher than 0.2 mg/kg, it will poison the mycelium of the brown skin side ear, thus affecting the growth and development of the brown skin side ear. In cultures that are not contaminated with mercury, the mercury content in brown skin side ears is very low, and there is no abunding phenomenon.
    , according to the current local test results, even if the heavy metals in edible bacteria exceed the standard, the average person also have to eat several kilograms of dried mushrooms a day to produce real harm. So, a normal diet doesn't have to worry too much. However, from the point of view of balanced diet, it is recommended that healthy people eat no more than 50 grams of mushrooms after water on average every day.
    the human body can metabolize heavy metals
    as for "the human body does not discharge heavy metal mechanisms" so "ultimately lead to necrosis of the kidney tube" this concept, has long been refuted by many scientific views.
    , even though edible bacteria contain trace amounts of heavy metals, they take a completely different form than heavy metals in environmental or atmospheric pollution. Heavy metals in the atmosphere are mostly found in inorganic forms such as carbonate binding, ferromanganese oxidation and residue, which are more toxic and easy to deposit in human body, while heavy metals in edible bacteria are mostly organic states that bind to metal sulfur protein, and some heavy metals can not be absorbed and discharged directly, and the toxicity has been greatly reduced.
    , on the issue of heavy metal metabolism, there are scientific studies confirmed that the human body itself has a certain metabolic capacity. For example, metal sulfur proteins that bind to heavy metals also exist in the human body, and if the amount of heavy metals in the body increases, it induces the body to produce more metal sulfur proteins, thus improving the ability to detoxify. In addition, glutathione in the liver can also be combined with heavy metal ions to form a certain structure of the mating compounds to achieve detoxification effect. And for some specific heavy metals, the body will also have special ways to target detoxification.
    for humans, the body's own ability to metabolize heavy metals is sufficient to protect us from their toxic hazards unless they are ingested in large quantities or over a long period of time in excess of the dose. What's more, the artificial cultivation of edible bacteria in the heavy metal content is very small, so in the normal consumption of the case, the human body has sufficient capacity to deal with heavy metals in edible bacteria.
    the end, calm your mood after being frightened by heavy metals. China's food safety standards have long made detailed heavy metal limits for all kinds of fungi food and medicine.
    China's Ministry of Health prescribed the content of lead (Pb) in food (drug) bacteria standards are: dry food (drug) bacteria not higher than 2.0mg/kg, fresh food (drug) bacteria not higher than 1.0mg/kg, food (drug) bacteria cans in Pb content is not higher than 1.0mg/kg.
    arsenic (As) content standard is: dry food (drug) bacteria not higher than 1.0mg/kg, fresh food (drug) bacteria not higher than 0.5mg/kg, food (drug) bacteria cans As content is not higher than 0.5mg/kg.
    mercury (Hg) standard is: dry food (drug) bacteria Hg content is not higher than 0.2mg/kg, fresh food (drug) bacteria Hg content is not higher than 0.1mg/kg, food (drug) bacteria cans Hg content is not higher than 0.1mg/kg.
    , with the protection of the regulator, there is no need to panic too much about the heavy metals in the mushrooms. Mushrooms purchased through formal channels are safe to eat as long as they are not picked and eaten privately.
    /Yi Han.
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