Ascorbic acid has been found to be involved in a number of biochemical processes. Function of vitamin C is related to its reversible oxidation and reduction characteristics; however, the exact role of this vitamin in the living system is not completely understood, since a coenzyme form has not yet been reported
The most clearly established functional role for vitamin C involves collagen biosynthesis. Beneficial effects result from ascorbic acid in the synthesis of repair collagen.
The main sources of vitamin C are fruits and green plants, but some foods of animal origin contain more than traces of the vitamin. Vitamin C occurs in significant quantities in animal organs, such as liver and kidney, but in only small quantities in meat.