GNC TriFlex is a dietary supplement that contains a clinical strength dose of glucosamine and chondroitin, which provides dietary support for healthy joints and bones. Each serving of GNC TriFlex also contains 1500 mg glucosamine hydrochloride, which may help support joint cartilage. Together, glucosamine and chondroitin support joint tissue and the ability to maintain healthy joints associated with aging or daily wear and tear. They encourage joint mobility and provide nutrients that support the body's natural ability to maintain enzyme systems involved in joint health. TriFlex dietary supplements also contain MSM, which provides sulfur, an important component for healthy joint cartilage. Encourages joint flexibility and comfort. Helps maintain joint function.