R-Garden's Vitamin C Complex contains 500 mg. of buffered vitamin C (from Calcium Ascorbate, Magnesium Ascorbate, Potassium Ascorbate, and Zinc Ascorbate) and 30 mg. of Bioflavonoid Complex (Rutin, Quercetin, and Hesperidin) in an easy to swallow and assimilate vegetarian capsule form which is the best possible way to take a vitamin C supplement. www.rgarden.com/vitamin_c.html