Selenium's role is:

1, antioxidant effect:

Selenium is a component of glutathione peroxidase, each mole of GSH-Px contains 4 grams of atomic selenium, the role of this enzyme is to catalyze the redox reaction of reducing glutathione and peroxides, so it can play an antioxidant role, is an important free radical scavenger. In the body, GSH-Px and vitamin E antioxidant mechanism is different, the two can complement each other with synergistic effect.

2, to prevent diabetes:

Selenium is the active ingredient that constitutes the enzyme glutathione peroxidase, which prevents the oxidative damage of pancreatic β-cells, normalizes their function, promotes glucose metabolism, reduces blood glucose and urinary glucose, and improves the symptoms of diabetics.

3, detoxification and detoxification:

Selenium has a strong bond with metals and can resist cadmium poisoning of the kidneys, gonads and central nervous system. Selenium and the body of mercury, lead, tin, thallium and other heavy metals combined to form a metal selenoprotein complex and detoxification, detoxification.

4, prevention and treatment of liver disease:

Chinese medical expert Yu Shuyu after 16 years of epidemiological investigations in areas with high incidence of liver cancer found that the selenium content in the blood of residents in areas with high incidence of liver cancer are lower than those in areas with low incidence of liver cancer, and the incidence of liver cancer is negatively correlated with the blood selenium level.

Extended information:

Selenium is essential to the human body and cannot be made on its own, so the World Health Organization recommends a daily supplement of 200 μg of selenium to prevent the high incidence of many diseases. World nutritionist and president of the Society of Biochemistry, Dr. Baboyarola said: selenium is the most important mineral nutrient to prolong life, embodied in its comprehensive protection of the human body, and it should not be thought of only when you are sick.

The selenium content of food and soil in a region has a direct relationship with the incidence of cancer, for example: the selenium content of food and soil in this region is high, the incidence of cancer and mortality rate will be low, and vice versa, the incidence of cancer and mortality rate of cancer in this region will be high, which shows that selenium and the incidence of cancer have a close relationship. At the same time, the scientific community also recognizes that selenium has the role of cancer prevention, is the human body trace elements of the "king of cancer prevention".

Baidu Encyclopedia--Selenium