One of Vitamin C's most important functions is that it contributes to the maintenance of a normal immune system, Furthermore, it also contributes to the reduction of tiredness & fatigue, as well contributing to normal collagen formation for skin, teeth and bones. Our supplement contains 1,000mg of Vitamin C per tablet, and 20mg of Citrus Bioflavonoids and 20mg of Rosehip per tablet. This is a 6 month supply! Some benefits you could see from taking regular Vitamin C Supplements: Contributes to the maintenance of a normal immune system Contributes to the reduction of tiredness and fatigue Contributes to normal collagen formation for skin, teeth and bones