Natures Aid Vitamin C contributes to the normal function of the immune system and increases iron absorption. -Vitamin C contributes to maintain the normal function of the immune system during and after intense physical exercise -Vitamin C contributes to normal collagen formation for the normal function of - ?blood vessels ?bones ?cartilage ?gums ?skin ?teeth -Vitamin C contributes to normal - ?energy-yielding metabolism ?functioning of the nervous system ?psychological function ?function of the immune system -Vitamin C contributes to the - ?protection of cells from oxidative stress ?reduction of tiredness and fatigue ?regeneration of the reduced form of vitamin E -Vitamin C increases iron absorption