It can be found in the hospital clinic that the number of cancer patients has increased a lot in the past two decades. These are not only related to environmental factors, food safety factors and social competition pressure, but also closely related to unreasonable dietary nutrition.

　　In the country''s 35 years of reform and opening up, the quality of life of Chinese people has relatively improved qualitatively. But the reaction is on the diet. Although the problem of under-eating is very rare, the problems of unbalanced eating, waste of nutrients and lack of corresponding problems are everywhere. Selenium is mainly abundant in seafood, especially shallow sea shells; it is also more abundant in red meat, especially animal internal organs, for example, the kidneys of animals are selenium-enriched parts; selenium is more abundant in wheat germ In addition, it is mainly rich in agricultural products in selenium-rich areas. For example, Enshi in Hubei and Ziyang in Shaanxi are China''s famous selenium-rich agricultural products.

　　 As an important antioxidant, selenium can fight aging, remove oxidized free radicals in the body, help the liver and kidney excrete heavy metal toxins, and has a good anti-cancer effect. It can suppress tumor cancer and supplement the dietary nutrition of tumor patients with radiotherapy and chemotherapy. During the fight against cancer tumors, selenium has a very important role. After in-depth research, it has been found that selenium can already be used to fight cancer and prevent cancer and relieve the suffering of patients, and improve the quality of life of patients.

　　Cancer cancer patients'' low immunity is an important inducement for the spread and differentiation of cancer cells. The fight against tumors and cancers depends mainly on the help of drugs in the clinic, but the adjustment of the diet is also a key point that cannot be ignored, which is very important for improving the cellular immune function of the body. Selenium has effects on non-specific immunity, humoral immunity and cellular immunity, which can promote lymphocytes to produce antibodies and increase blood immunoglobulin levels.

　　 Cancer patients have extensive anti-oxidation imbalances and excess harmful free radicals in the body. Selenium can effectively eliminate many lipid peroxides and hydrogen peroxide through a series of selenium-containing antioxidant enzymes In order to relieve and block tumor blood vessel formation, to a certain extent, prevent tumor recurrence and metastasis.