Hyaluronic acid is a component of synovial fluid, and is found in  the synovia of joints, and in subcutaneous tissue where it functions is as a cementing agent. Hyaluronic acid is a glycosaminoglycan with anti-inflammatory and anti-edematous properties. In osteoarthritis, changes occur in the hyaluronic acid found in cartilage leading to degradation of the cartilage. Optimum levels of hyaluronic acid are essential for the health of the joints and cartilage.