What are the harmful effects of excessive selenium intake on human health?

Excessive selenium supplementation can lead to selenium poisoning, hair loss, nail loss, etc.

Acute selenium poisoning: daily selenium intake of up to 400 800 mg kg body weight can lead to acute poisoning. Presents with abnormal movements and postural pathology, dyspnea, gastric distention, high fever, rapid pulse, collapse, and death due to respiratory failure.

Chronic selenium poisoning: Chronic selenium poisoning is often caused by a daily intake of 2400 to 3000 micrograms of selenium from food, which can take several months before symptoms appear. Manifested by hair loss, nail loss, yellow staining, bad breath, fatigue, increased susceptibility to dental caries, depression, etc.

It's too much, for sure, it's a trace element.

Excessive selenium intake may cause selenium poisoning. Selenium poisoning is caused by varying degrees of selenium poisoning caused by eating food and water with high selenium content, or by engaging in certain jobs that often involve selenium. Poisoning can also occur in animals when they ingest pasture or other feeds with high selenium content.

Selenium is a chemical element with the chemical symbol SE, which is located in the fourth period of the periodic table of chemical elements and is a non-metal. It can be used as a photosensitive material, a catalyst for the electrolytic manganese industry, an essential nutrient element for the animal body and a beneficial nutrient element for plants.

There are two ways of selenium in nature: inorganic selenium and plant-active selenium. Inorganic selenium generally refers to sodium selenite and sodium selenite, which are obtained from the by-products of metal deposits, the latter is the combination of selenium and amino acids through biotransformation, and generally exists in the form of selenomethionine.

Selenium overdose can cause poisoning. It is manifested as dry and brittle hair, easy to fall out, brittle nails, white spots and longitudinal lines, easy to fall out, ** injury and nervous system abnormalities, and death in severe cases.

Selenium supplementation should not be excessive, only a maximum of 100 micrograms per day, and the dietary selenium content in most areas of China is sufficient and safe. Selenium poisoning caused by selenium overdose is clinically acute, subacute and chronic. The main cause of poisoning is the body's direct or indirect exposure to a large amount of selenium, including occupational and regional reasons, dietary habits, etc.

The picture shows selenium-rich foods:

Selenium is an important material for the manufacture of electronic components and an essential trace element for the human body. Although the human body does not contain much selenium, it plays an important role in human health, and selenium is an indispensable component of glutathione peroxidase. Glutathione peroxidase participates in the oxidation process of the human body, can prevent the oxidation of unsaturated acids, and can prevent aging and tissue hardening caused by oxidation.

Avoid the production of toxic metabolites, thereby greatly reducing the inducing substances of cancer and maintaining normal metabolism. Scientists have found that the incidence of cancer in Eastern ethnic groups is significantly lower than that in Europe and the United States, and one of the important reasons is that Oriental people have a higher intake of selenium. Garlic has a cancer prevention effect because it contains more selenium.

In addition, selenium is also resistant to cadmium, which causes heart disease, as well as toxic substances such as arsenic and mercury, and is an effective antidote. According to the analysis of scientists, there is a selenium-containing enzyme in the human body, which can catalyze and eliminate free radical substances that are harmful to the eyes, thereby protecting the cell membranes of the eyes. In addition, the contraction of the pupils and the muscle contractions caused by the movement of the eyeballs are inseparable from the effect of selenium.

Scientists believe that the human body must consume 50 mg of 250 mg of selenium per day. If the human body is deficient in selenium, it is prone to large bone joint disease, Keshan disease, stomach cancer, etc. Selenium also has the effect of weakening aflatoxin causing liver cancer and inhibiting the occurrence of breast cancer (what are the benefits of selenium on the human body.

Therefore. Care must be taken to consume foods containing selenium. Fish, lobster and some crustacean aquatic products are extremely rich in selenium.

The second is the heart, liver, kidneys and other organs of the animal. Vegetables such as shepherd's cabbage, asparagus, peas, Chinese cabbage, pumpkin, onions, tomatoes, etc. also contain a certain amount of selenium. The bran of cereals also contains small amounts of selenium.

The amount of selenium ingested must be appropriate. If it exceeds the needs of the human body, it may cause pneumonia, liver and kidney function deterioration and other diseases. Ingestion of large amounts of selenium can lead to death from chronic poisoning.