Fluid Action® HA 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.