Hyaluronic acid ha belongs to a class of polysaccharide compounds known as glycosaminoglycans gags and is found in almost very cell within the body ha is a hydrophilic waterloving molecule capable of holding up to a thousand times its own weight in water it is often referred to as natures moisturiserha is especially abundant in the components of the joints such as cartilage and synovial fluid as well as in the skin and eyes over fifty percent of the bodys stores of ha is found in the skin