Glucosamine is an aminosaccharide synthesized from glucose and the amino acid L-glutamine. HCl (hydrochloric acid) stabilizes the glucosamine in this product. Glucosamine is a component of joint and intestinal tissue and is involved in the production of synovial fluid; which lubricates the joints.* Glucosamine is converted to N-acetyl-glucosamine in the intestines by the goblet cells.* Glucosamine HCl is SALT FREE. Jarrow FORMULAS Glucosamine HCI is Joint Sustain nutrition; providing a SODIUM FREE form of glucosamine.For best results; use with Jarrow FORMULAS JarroSil ; the biologically Activated Silicon .Keep out of the reach of children.