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 in the joints and acts as a lubricating substance within the joint, creating a protective barrier that reduces friction. This relieves inflammation pain by improving joint function. 
like glucosamine and chondroitin, HA works better with anti-oxidants. Vitamin C and natural vitamin E are powerful antioxidants which aid in the bioavailability of the other ingredients. They accomplish that by significantly increasing the cellular nutrient absorption potential. Antioxidants reduce the pain of arthritis by aiding to control inflammation.