Our timed release formula is designed to provide longer lasting action as the nutrients are released over an extended period of time. Functions of Vitamin C: Vitamin C contributes to the normal function of the immune system Vitamin C contributes to normal collagen formation for the normal function of blood vessels, bones, cartilage, gums, teeth and skin Vitamin C contributes to normal energy yielding metabolism Vitamin C contributes to the normal functioning of the nervous system Vitamin C contributes to normal psychological function Vitamin C contributes to the protaction of cells from oxidative stress Vitamin C contributes to the reduction of tiredness and fatigue Vitamin C increases iron absorption