This product is a dietary supplement which is the combination of the glucosamine sulfate potassium chloride , chondroitin sulfate and MSM. It contains three important substances for the articular cartilage of bone to normally operate. Glucosamine exists in cartilages and connective tissues, which is the main component of human joints cushion lubrication structure, and it is also the necessary material for formation of cartilage cells. Chondroitin sulfate is the necessary substance to repair cartilages and regenerate cartilage cells. Dimethyl sulphone is the essential material for the synthesis of collagen. By scientific and rational formula, the product is made with three kinds of materials that mixed into one, which provide more adequate nutrition for the cartilages and connective tissues of the bones and joints.