Every cell in the supplements because the body relfes on a sufficient supply of vitamins to do its metabolic work. In this way, vitamins perform many functions. Among other things, they promote blood formation and healthy skin, hair and vision; they help to maintain nerves and muscles; and they aid in the release of energy from foods. Recent research suggests that some vitamins can even help prevent certain disorders. such as cancer, cataracts, arthritis and heart disease. Most vitamins must be obtained from foods or body cannot produce them. Vitamin deficiencies are common in many groups of people dieters; pregnant or nursing women; the elderly; people under stress; and those taking medications, such as cortisone or antibiotics. Plus, cigarettes, coffee, alcohol and birth- control pills all rob the body of vitamins. The first signs of a vitamin deficiency are fatigue, irritability and anxiety. Over time, the immune system will weaken.