Selenium functions synergistically in the body with vitamin E as a potent antioxidant, preventing the oxidation of lipids (fats). It is an essential co-factor for glutathione peroxidase, an important antioxidant enzyme that protects the cellular membranes of every cell in the body. Selenium may help to support immune function & plays an important role in protecting & maintaining the functions of vital body organs such as the heart, liver, lungs, pancreas & thyroid glands. Individuals on a poor diet, the elderly, pregnant & lactating women, smokers, vegetarians & vegans may have an increased dietary requirement for selenium