The role of vitamin C: 1, can remove free radicals, appropriate supplementation of vitamin C, there is a very good antioxidant, anti-aging effect. 2, can promote the absorption of iron, because vitamin C can make the trivalent iron reduced to divalent iron, which can promote the rate of absorption of iron. 3, can promote the production of collagen, appropriate supplementation of vitamin C has a very good beauty effect. 4, can be used to reduce cardiovascular disease, because vitamin C can regulate the elasticity of blood vessels, the prevention of atherosclerosis is also very obvious. Reduce cardiovascular disease, because vitamin C can regulate the elasticity of blood vessels, in the prevention of atherosclerosis is also very obvious. Vitamin C is a polyhydroxy compound with acidic properties also known as ascorbic acid, has a strong reducing properties, can easily be oxidized into dehydrovitamin C. Vitamin C is essential for the formation of antibodies and collagen, tissue repair, phenylalanine, tyrosine, folate metabolism, iron, carbohydrate utilization, fat, protein synthesis, maintenance of immunity, hydroxylation of 5-hydroxytryptophan, to maintain the integrity of the vasculature and to promote the absorption of non-heme iron and so on. Hemoglobin iron absorption and other necessary to maintain the activity of sulfhydryl enzymes play a detoxifying role. Supplementing the body with large amounts of vitamin C can alleviate the toxic effects of lead, mercury, cadmium, arsenic and other heavy metals on the body, many studies have proved that vitamin C can block the synthesis of carcinogenic substances N-nitroso compounds to prevent cancer. At the same time, vitamin C also has antioxidant, anti-free radicals, inhibit the formation of complex enzyme, to whiten, light spot effect.