Participate in material metabolism, regulate immune function, and keep blood vessels intact. Vitamin C tablet is a drug to supplement vitamin C. Vitamin C can participate in the metabolism of various substances in the body, including the synthesis of fat and protein, the formation of antibodies and collagen in the body, the metabolism of phenylalanine, tyrosine, folic acid, and the utilization of iron and some carbohydrates. In addition, it can also participate in tissue repair, regulate immune function, maintain vascular integrity and other functions. Therefore, if the human body is lack of vitamin C, it may cause a variety of diseases, including scurvy and some infectious diseases, iron deficiency anemia, hemorrhagic purpura and other diseases. Therefore, taking vitamin C tablets can effectively prevent scurvy, which is an auxiliary treatment for acute and chronic infectious diseases, hemorrhagic purpura, and iron deficiency anemia. Clinical studies have shown that it can also help to improve liver damage and the recovery of many inflammatory infections, but this drug is not suitable for long-term overdose.