Dietary Supplement 3 Capsules Daily Support for Joint Health 21st Century...For A Healthier Future Guaranteed Quality- Laboratory Tested 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 the healthy functioning of tendons and joints, especially with advancing age. 21st Century's Glucosamine & Chondroitin, combines these two nutritional elements in the proper amounts for your effective use.