Super C Complex is Nature's Plus' sustained release formula of the antioxidant vitamin C. It provides 1,000 mg of vitamin C along with 500 mg of bioflavonoids for optimum free-radical fighting support for your entire body. Super C Complex 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, corn, soy and milk.