Glucosamine is an amino sugar derived from the chitrin of shellfish. It is utilized by the body to support healthy joint structures. Glucosamine hydrochloride (HCI) is considered to be as stable and as effective as other glucosamine compounds. Our glucosamine "1000" contains the highest grade glucosamine at a significantly lower cost than glucosamine sulfate. Glucosamine is composed of glucose and glutamine (an amino acid). It is utilized by chondrocytes to form glycosaminoglycans (GSG's) and proteoglycans. Both of these constituents attract and bind water into cartilage, increasing resiliency.