The main function of Vitalis is to treat osteoarthritis of the knee joint and meniscus damage of the knee joint, which are commonly seen in clinical practice. The main principle of its action is that through exogenous intake of glucosamine, the glucosamine content in the joint is in a balanced state, which stimulates the synthesis of more proteoglycans and collagen fibers by the chondrocytes to produce cartilage matrix and repair the broken cartilage, so that the ability of the joint cartilage to repair itself can be improved accordingly. By repairing articular cartilage through glucosamine, it can also achieve the effect of catalyzing the amount of synovial fluid in the joint, which can play a fundamental role in the treatment of osteoarthritis. In addition, it can also be used to treat meniscal damage in the knee joint, mainly because glucosamine can repair the meniscus directly and repair meniscal damage at the root. In addition, glucosamine is also able to remove harmful factors from the knee joint and inhibit and eliminate the inflammatory response of the synovial membrane, but this treatment takes a longer time, usually about 3 months.