Dietary Supplement. Best Value ~ Super Size. 70-Day Supply. Glucosamine 500 mg. Chondroitin 400 mg. The Natural Choice to Promote Cartilage Regeneration and Support Healthy Joints* 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 Glucosamine & Chondroitin, combines these two nutritional eleme.