Sustained Release Super C Complex is Nature's Plus formula of the antioxidant vitamin C. It provides 1,000 mg of vitamin C, as well as  500 mg of bioflavonoids for optimum free-radical-fighting support for your entire body. This formula was developed with a special base which provides for the gradual release of ingredients over a prolonged period of time. It is free of common allergens like yeast, wheat, soy and milk.