Hyaluronic Acid is a long chain sugar molecule which holds up to 1000 its own weight of water making it gel like to help act as a cushion . Its fills space and acts as a cushion for joints, nerves, skin, eyes and keeps the skin hydrated. This formula combines HA with MSM, Glucosamine, Chondroitin Sulfate, Shark Cartilage and Vitamin C. 120 Capsules