Vita Flex Pro Hylamotion Equine Joint Supplement delivers 100 mg of premium hyaluronic acid (HA) per serving, blended in a palatable alfalfa and grain base. Hylamotion HA is ideal for horses facing the strains of aging, training or competition, to keep joints lubricated. It is a major component of skin, cartilage and synovial fluid, the shock-absorbing fluid in the joints. Hyaluronic acid is found both in joint fluid and the cartilage itself. It is a major factor contributing to the slippery feel of joint fluid. HA helps trap fluid in the cartilage and keeps it flexible and resistant to being overly compressed.