Dietary Supplement Best Value The Natural Choice to Promote Cartilage Regeneration and Support Healthy JointsMany 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 to your effective use. This product is not, however, intended to replace the advice of your physician.