Main physiological function 1. Promote collagen biosynthesis. Conducive to faster wound healing tissue; 2. Promoting amino acids tyrosine and tryptophan metabolism and prolong life of the body. 3. Improve the iron, calcium and folic acid use. 4. Improved fat and lipid metabolism, especially cholesterol, prevent cardiovascular disease. 5. Promote the growth of teeth and bones and prevent bleeding gums. ; 6. Enhance the body's external environment, anti-stress and immunity. Vitamin C deficiency and disease: vitamin C deficiency, its symptoms are: 1. Swelling and bleeding gums, gum ulcers, loose teeth. 2. Skeletal deformities, fractures easily. 3. Difficult wound healing. Further the cause scurvy, anemia. 4. Bleeding and heart failure, there is serious risk of sudden death. 5. Muscle fibers recession, including myocardial depression.