Glucosamine is a naturally occuring compound found in the human body.Glucosamine, as found in the human body, is one of the compounds required by the body to build and maintain tendons, cartilage, and ligaments. The glucosamine used in our product is derived from non-GMO corn rather than shellfish or other animals. MSM (Methyl Sulfonyl Methane) is an efficient source of sulfur, which is necessary for the formation of collagen, and is required by many of the body's structural molecules. CMO (Cetyl Myristoleate) and Boswellia Herb Extract are included for extra support. CMO used in our product is derived from plant sources rather than the usual beef tallow. DEVA Glucosamine is perfect for vegans, vegetarians or people with shellfish allergies who would also like to benefit from glucosamine. DEVA™ Glucosamine-MSM-CMO is 100% vegan, vegetarian and is certified by the Vegan Society, the non-profit organization that actually invented the word "vegan". It is the only 100% vegan product in the world that combines Glucosamine, MSM, CMO and boswellia all in one tablet .