Dietary supplement 2 tablets daily 100 percent vegetarian formula the natural choice to promote cartilage regeneration and support healthy joints 21st century. For a healthier future. Many recent scientific studies have shown the effectiveness of taking supplements with the proper combination of glucosamine sulfate and chondroitin sulfate. These compounds found in the soft cartilage, tendons, and synovial fluid, are essential to a healthy functioning of tendons and joints, especially with advancing age. 21st century's glucosamine and chondroitin triple strength, combines these two nutritional elements in the proper amounts for your effective use.