How Is Hyaluronic Acid (H.A.) Different from Glucosamine or Chondroitin?Glucosamine, chondroitin and hyaluronic acid (H.A.) are all related molecules, found naturally in the body. Glucosamine is an amino sugar found in the bones and bone marrow of animals and humans. • Its main function is the formation (production) of glycosaminoglycans, [...]