Dietary Supplement 25% Free 50-Day Supply Double Strength 3 Capsules Daily 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 s® Glucosamine & Chondroitin, combines these two nutritional elements in the proper amounts for you effective use.* Contains glucosamine sulfate derived from shrimp and crab shells. ; *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.