Guaranteed Pure CO2 Supercritical Extraction Joint Support Dietary SupplementDiscussion: Mucopolysaccharides, commonly called glycosaminoglycans, are long chains of sugar molecules that are found throughout the body and in fluid around the joints.Health From The Sun New Zealand Green Lipped Mussel uses CO2 extraction to ensure a pure source of Mucopolysaccharides as well as trace amounts of Chondroitin Sulfate, vitamins and minerals in every serving.