C-vitamin, Buffered, 4000 mg, 454 gram Pulver, Life ExtensionDescription Vitamin C contributes to: the normal function of the immune system normal collagen formation, which is important for normally functioning blood vessels, bones, cartilage, gums, teeth, and skin. Daily dose contains 4000 mg of Vitamin C (as ascorbic acid). Nutritional content 1 teaspoon contains: Vitamin C (as ascorbic acid) 4000 mg Calcium (as calcium carbonate) 145 mg Magnesium (as magnesium carbonate) 55 mg Zinc (as zinc gluconate) 2 mg