GLUCOSAMINE SULFATE (GS) is an aminoglycan comprised of glucose and glutamine. Glucosamine is a component of joints and intestinal tissue and is involved in the production of synovial fluid which lubricates the joints. Sulfur is also utilized in the production of cartilage tissue. This product is best taken with Jarrow formulas BioSil, the only high potency source of orthosilicic acid, the Biologically Active form of Silicon.