Glucosamine is an essential substrate for the formation of glycoaminoglycans (GAG's) and proteoglycans, which are the main components of cartilage tissue. GAG's and proteoglycans trap and hold water, forming a dense fluid cushion within the joint and thus, provide lubrication and shock absorption. MSM (Methylsulfonylmethane) is a natural source of organic sulfur, a mineral necessary for the production of proteoglycans.* NOW's unique and synergistic formula is suitable for vegetarians, because it contains only Glucosamine from a vegetarian source and not from shellfish. Contains no: sugar, salt, starch, yeast, wheat, gluten, soy, milk, egg, shellfish or preservatives. Vegetarian/Vegan Product.NOW Foods developed the glucosamine test method chosen as the official AOACI industry standard method.The Glucosamine used in this product is derived from a Non-GMO corn source.GreenGrown® and the GreenGrown® logo are registered trademark of Ethical Naturals, Inc.Vcaps® is a registered trademark of Capsugel.Store in a cool, dry place. Please Recycle.