HA is a component of collagen, and is classified as a mucopolysaccharide. It belongs to the same category as Chondroitin and Glucosamine. It functions by attracting water to the synovial fluid and acts as a lubricating substance within the joint creating a protective barrier that reduces friction relieving inflammation and pain by improving joint function. Like Glucosamine and Chondroitin, H.A. works better with anti-oxidants like Vitamin C, Natural Vitamin E, Alpha Lipoic Acid.