Selenium is an essential trace element for the human body, which not only has antioxidant properties, but also is an important synthesis element of many antioxidant enzymes, such as glutathione peroxidase.
The Chinese Nutrition Society lists selenium as one of the 15 essential nutrients for the human body, and the recommended selenium intake is 50ug d. A large number of clinical experiments at home and abroad have proved that long-term selenium deficiency in the human body may cause dysfunction of some important organs and lead to the occurrence of many serious diseases. From Heilongjiang in the northeast to the Qinghai-Tibet Plateau in the southwest, there is a selenium-deficient belt in China, and many provinces and cities along the way are in the selenium-deficient or low selenium zone, and the incidence of tumors, liver diseases, and cardiovascular diseases in these areas is very high.
Tumor patients receiving chemoradiotherapy can kill cancer cells, but at the same time it also produces toxicity to organisms, selenium can reduce the toxicity of the drug cisplatin, but will not reduce its anti-cancer activity, plus selenium itself has a certain inhibitory effect on the growth of tumors, so it is recognized as an ideal antidote.
Studies have shown that selenium deficiency or selenium deficiency can not only prevent the occurrence of tumors, liver diseases and cardiovascular and cerebrovascular diseases, but also improve the body's immunity, maintain the normal function of important organs such as the heart, liver, lungs and stomach, and prevent the occurrence of chronic and serious diseases.
Selenium has a role in non-specific, humoral and cellular immunity, which can promote the production of antibodies by lymphocytes and increase blood immunoglobulin levels. Selenium can effectively remove many lipid peroxides, hydrogen peroxide and other harmful substances through a series of selenium-containing antioxidant enzymes, thereby alleviating and blocking tumor vascular formation, and preventing tumor metastasis to a certain extent.
Selenium is mainly found in soil and water sources, and the Enshi region of Hubei Province and the Ziyang region of Shaanxi Province are the main production areas of selenium-rich agricultural products in China. In addition to high-selenium agricultural products produced in selenium-rich producing areas, aquatic products such as fish, shrimp, crabs and shellfish, animal liver and kidney, and wheat germ are all selenium-rich foods, and vitamin E will increase the antioxidant effect of selenium.
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