Joint Health Joint Mobility and Comfort GreenGrown Glucosamine A Dietary Supplement Vegetarian - Vegan Non-GMO General Health Family Owned Since 1968 GMP Quality Assured NOW Vegetarian Glucosamine '1000' is a well-known joint support ingredient that is vegetarian/vegan friendly and not shellfish-derived. 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.