Twinlab Advanced Shark Cartilage Extract standardized for protein and mucopolysaccharides. Unlike crude shark cartilage powder, the active ingredients in this product are highly concentrated and purified for maximum biological activity. Each capsule contains only the highest quality shark cartilage extract obtainable, imported from Japan. The shark cartilage concentrate is encapsulated at our own state of the art facilities with stringent quality control assuring correct potencies and outstanding product freshness. Packaged in a glass bottle for maximum stability, quality and freshness.