Derived from a plant source, Vegetarian Glucosamine Hydrochloride is an alternative form of glucosamine. Rather than being sourced from shellfish, it is found in a fungus known as Aspergillus niger. Glucosamine is produced naturally in the joints of the body but rarely found in major food sources. It is a key structural component of joint tissue. Glucosamine is the basis of the synthesis of several important macromolecules including glycoproteins, glycolipids and glycosaminoglycans. These macromolecules can be found in the synovial fluid, cartilage, tendons, ligaments and muscles.