[Functions] vitamin supplements. The main function of ascorbic acid is to be involved in cell interstitial collagen production, maintaining capillary permeability, stimulating cortisol and other hormones, promoting the formation of antibodies and the phagocytic capacity of white blood cells, improving animal immunity. In the prosess of bio-oxidation, it plays a role in passing hydrogen and electrons, detoxifying, antioxidant, anti-scurvy and anti-stress, and also plays an active part in the synthesis of carnitine, changing a folic acid into active tetrahydrofolate and intestinal absorption on iron.