It contains glucosamine and chondroitin, two ingredients present in cartilage. In addition, this natural formula also includes MSM (methylsulfonylmethane), boswellic acids, collagen, hyaluronic acid, selenium and zinc, which complement the formula with their beneficial effects. Zinc contributes to the maintenance of hair, nails and skin in normal conditions, in addition to also helping normal acid-base balance and normal carbohydrate metabolism. Instructions for use: Take 2 tablets a day with a glass of water.