Non-GMO Joint Health Joint Mobility and Comfort A Dietary Supplement General Health Family Owned Since 1968 GMP Quality Assured Now Glucosamine Sulfate is well-known joint support ingredient. Glucosamine is an essential building block for the formation of glycosaminoglycans (GAGs) and proteoglycans, the main components of cartilage tissue. These compounds attract water to form a joint cushion, providing lubrication and shock absorption. Now Foods developed the glucosamine test method chosen as the official AOACI industry standard method.