Vitamin C 1000mg Time Release with Bioflavonoids by Nature"s Plus 90 Sustained Release Tablet Theres a reason why Vitamin C is the most well-known and highly regarded vitamin in the world This antioxidant affects many of the body"s systems including the vascular system and natural defenses. This high-potency Vitamin C with Bioflavonoids is prepared in a special base which provides for the gradual release of ingredients over a prolonged period of time. Nature"s Plus uses the most current controlled techniques to prevent the damaging effects of moisture light and oxidation for all its products.