Nature's Harbor Shark Cartilage Powder is an excellent source of calcium and phosphorous. It contains a family of carbohydrates called mucopolysaccharides, including chondroitin. Chondroitin provides dietary support for healthy joints and bones. It may be beneficial for alleviating joint pain and stiffness. Contains only the highest quality Shark Cartilage Extract obtainable. Unlike crude Shark Cartilage powder, the active ingredients in this product are highly concentrated and purified for maximum biological activity.