Vitamin C is necessary for the formation of antibodies and collagen, tissue repair (including some redox), phenylalanine, tyrosine, folate metabolism, iron, carbohydrate utilization, fat, protein synthesis, maintenance of immune function, hydroxylation of 5-hydroxytryptophan, to maintain the integrity of blood vessels, to promote the absorption of non-heme iron, and so on, and at the same time, Vitamin C has an antioxidant, anti-free radicals, inhibit the formation of tyrosine enzyme, so as to achieve whitening, lightening effect. The Vitamin C is also an antioxidant, anti-free radical, and inhibitor of tyrosine enzyme formation, thus achieving whitening and lightening the effect of spots.

In the human body, vitamin C is a highly effective antioxidant, used to reduce ascorbate peroxidase (ascorbate peroxidase) sch oxidative stress (oxidative stress). Vitamin C is also involved in many important biosynthetic processes.

Since most mammals synthesize vitamin C in their livers, there is no problem of deficiency; however, humans, primates, groundhogs, and a few other animals cannot synthesize it on their own, and it must be ingested through food, drugs, and so on.

Vitamin C can be oxidized or reduced in the body, so it can be used as a hydrogen donor and hydrogen acceptor, playing an important role in the redox process.

Promoting antibody formation. High concentrations of vitamin C help reduce cystine in food proteins to cysteine, which in turn synthesizes antibodies.

Promotes iron absorption. Vitamin C promotes iron absorption by reducing trivalent iron, which is difficult to absorb, to divalent iron, which is easily absorbed. In addition, it can also make the sulfhydryl groups of ferrous complexing enzymes and other enzymes in an active state in order to function effectively, so vitamin C is an important adjunctive drug for the treatment of anemia.

Promoting tetrahydrofolate formation. Vitamin C can promote the reduction of folic acid to tetrahydrofolate and then play a role, so it also has a certain effect on megaloblastic anemia.

Maintains mercapto enzyme activity.

Detoxification. When the body is supplemented with large amounts of vitamin C, it can alleviate the toxic effects of heavy metals such as lead, mercury, cadmium and arsenic on the body.

Prevention of cancer. Many studies have proved that vitamin C can block the synthesis of carcinogen N-nitroso compounds and prevent cancer.

Scavenging free radicals. Vitamin C can be converted to semi-dehydroascorbic acid and dehydroascorbic acid through the process of supplying electrons step by step to clear the body of super-negative oxygen ions (O2-), hydroxyl radicals (OH-), organic free radicals (R-) and organic peroxyl radicals (ROO-), and other free radicals; so that tocopherol radicals to revert back to tocopherol, the reaction generated by ascorbic acid free radicals under certain conditions can be the system of NADH2 enzyme action to reduce to ascorbic acid.

Information from the Baidu encyclopedia explains the relevant terms