ANTIOXIDANT PROTECTION*: NOW C-500 Calcium capsules provide a daily dose of vitamin C, which is necessary for the production of collagen and is therefore also important for skin, bone, and joint health.* CALCIUM ASCORBATE-C WITH BIOFLAVONOIDS: This product supplies calcium ascorbate, a buffered form of vitamin C that is bioavailable and non-acidic; it is enhanced with bioflavonoids, which work synergistically with vitamin C.* CERTIFICATIONS/CLASSIFICATIONS: Quality GMP Assured, Non-GMO, Soy Free