Vitamin C Contributes to iron absorption from food, necessary for normal connective tissue structure and function, blood vessel structure & function, cell protection from free radical damage, normal neurological function, maintain immune system during & after physical stress, contribute to normal function of the immune system, normal collagen formation in the blood vessels, bone, cartilage, gums, skin, teeth, energy yielding metabolism, normal function of the nervous system, psychological, immune system, contributes to protection of cells from oxidative stress, reduction of tiredness and fatigue, regeneration of the reduced form of Vitamin E.