Vitamins are nutrients absolutely essential for the normal functioning of the body. Continuous scientific studies document the necessity of having all vitamins in the necessary quantities. Energy: Vitamin B complex and Iron, essential for the metabolism of food into energy. Immunity: Antioxidants essential for the normal functioning of the immune system. Healthy Skin: Vitamins A, C and biotin for healthy skin. Environmental Factors: Vitamins C, E and Selenium are powerful antioxidants that act against the effects of free radicals.