Schiff - Vitamin C 500 mg with Rose Hips Tablet, 100 Count 10306 (DMi EA Vitamin C is a powerful antioxidant, with important roles in connective tissue, bone and skin health, immune function, and cardiovascular health. Vitamin C, also known as ascorbic acid, is a water-soluble vitamin needed by the body for many vital metabolic reactions. Vitamin C is needed as a coenzyme for many metabolic pathways. It is also necessary to convert folic acid into its active form, and helps the body absorb iron. This formula combines Vitamin C with rose hips (a natural form of bioflavonoids) in order to enhance absorption.