Biochemistry of Selenium

In recent years many exciting research results have indicated that selen- ium, depending on its concentration, can influence mammalian metabo- lism. It has been estimated that in selenium-deficient areas, selenium or selenium-vitamin E combinations added to animal feed can prevent an- nuallosses to beef and dairy cattle and sheep valued at 545 million dollars and poultry and swine losses valued at 82 million dollars. Some animal diseases that can be prevented by a selenium-supple- mented di...