Vitamin C plays a number of different important roles :- It promotes the production of collagen to strengthen blood vessels, bones, cartilage, gums, teeth and skin.- It promotes metabolic reactions and thus helps reduce fatigue.- It supports a healthy nervous system.- It boosts the immune system.- It protects against free radicals. It promotes the regeneration of the reduced form of vitamin E.- It increases the absorption of iron.Also available in boxes of 150 and 170 tablets.