* Dietary Supplement * Source of Muchopolysaccharides Shark cartilage has been extensively studied for its ability to strongly inhibit the growth of new blood vessels (angiogenesis). This beneficial "antiagiogenic" effect is thought to be the result of the interplay of shark cartilage"s key ingredients - namely, chondroitin sulfate and similar molecules known as "glycosaminoglycans" or "mucopolysaccharides". Natural Factors shark cartilage is rigorously tested for heavy metals.