As far as selenium supplementation is concerned, excessive selenium can easily lead to the disorder of vitamin B 12, folic acid and iron metabolism, which may disturb the functions of nerves, blood, skin and digestive system, thus causing:
Rash and itchy skin;
Numbness of limbs and dull pain in the skin;
Hair loss and nail thickening;
Dizziness and pallor;
Loss of appetite, gastrointestinal dysfunction, indigestion.
What effect does selenium have on human body?
More than 40 diseases that threaten human health and life are related to human selenium deficiency, such as cancer, cardiovascular diseases, liver diseases, cataracts, pancreatic diseases, diabetes, reproductive system diseases and so on.
1. Blood selenium level is related to cancer.
A survey shows that the selenium content in food and soil in an area is related to the incidence of cancer. For example, if the selenium content in food and soil in some areas is low, the incidence and mortality of cancer will be high.
Some studies believe that selenium can prevent cancer.
2. Decreased blood selenium level will reduce the human body's function of scavenging free radicals.
This will lead to an increase in the deposition of harmful substances, an increase in blood pressure, a thickening of blood vessel walls, a decrease in blood vessel elasticity, a slow blood flow and a decrease in oxygen delivery function, thus inducing cardiovascular and cerebrovascular diseases.
Scientific selenium supplementation has a good effect on preventing cardiovascular and cerebrovascular diseases, hypertension and arteriosclerosis.
3. Selenium deficiency is the main cause of Keshan disease and Kaschin-Beck disease.
Selenium supplementation can prevent bone marrow lesions, promote repair, and promote disulfide bonds to resist the detoxification of metal elements in protein synthesis. It has good preventive and therapeutic effects on patients with these two endemic diseases and arthritis.