Fluid ActionHA provides the same great benefits as original Fluid Action except with added Sodium Hyaluronate (HA) for extra support in promoting healthy joints. Sodium Hyaluronate, or Hyaluronic Acid supports healthy joint function by lubricating joints and helping to maintain structural integrity. Fluid Action HA contains Glucosamine, Yucca, MSM, Vitamin C, and many other beneficial ingredients. Available sizes Liquid 32 fl oz, 32 day supply for 1 horse, maintenance (1 fl oz per day) 128 fl oz, 128 day supply for 1 horse, maintenance (1 fl oz per day)