What is selenium? Why is it essential for good health?             Selenium is a mineral found in the soil and in all plants, animals, and foods. It is essential to life. Selenium is in every cell of the body forming the active part of glutathione-peroxidase (GPx) the universal antioxidant that helps keep every cell healthy and detoxified. Nutritionists refer to selenium as an essential trace element. Although found in tiny amounts, it is essential to health. Selenium is concentrated in the cells and organs of the immune system and affects all aspects of immune function. When total selenium levels in the body fall to 80% of normal, a person has immune deficiency. When it falls below 70%, a person dies. How does selenium work against HIV? ...