Selenium

Forms:  Sodium selenite, selenomethionine

Sources:  Brazil nuts, salmon, halibut, shrimp

RDA:  70 mcg for lactating mothers

Description:  Selenium is an important antioxidant, especially when used with vitamin C and vitamin E.  It also helps to regulate thyroid hormones for normal growth and development.  A selenium deficiency can lead to deterioration of muscles (including heart muscles).  In addition, the deficiency can lead to depressed immunity and increased susceptibility to viral infections.  Selenium dosages in excess of 400 mcg/day are not recommended.