C-Ascorbs Time Release by Nature"s Plus 180 Sustained Release Tablet The ultimate sustained release super-potency Vitamin C with mineral ascorbates. C-Ascorbs contains 4 000 mg of Vitamin C 400 mg of Bioflavonoids and five essential minerals combined in a special base which provides for the gradual release of ingredients over a prolonged period of time. As part of its commitment to quality Nature"s Plus always uses the most current controlled techniques to prevent the damaging effects of moisture light and oxidation for all its products.