It contains glucosamine and chondroitin, two ingredients found in cartilage. This natural formula also includes MSM (methylsulfonylmethane), boswellic acid, collagen, hyaluronic acid, selenium, and zinc, which complement the formula with their beneficial effects. Zinc contributes to the maintenance of normal hair, nails, and skin, as well as supporting normal acid-base balance and carbohydrate metabolism. Directions for use: Take 2 tablets daily with a glass of water.