Vegetarian Joint Health Joint Mobility and Comfort Green Grown Glucosamine A Dietary Supplement Vegetarian/Vegan Non-GMO General Health Family Owned Since 1968 GMP Quality Assured NOW Vegetarian Glucosamine & MSM combines two well-known joint support ingredients in a vegetarian/vegan friendly formula that does not include shellfish-derived Glucosamine. 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. MSM (Methylsulfonylmethane) is an organic form of sulfur, a mineral necessary for the production of GAGs and proteoglycans. Now Foods developed the glucosamine test method chosen as the official AOACI industry standard method.