Fluid Action® HA provides the same great benefits as original Fluid Action® except with added Sodium Hyaluronate (HA) for extra support in preserving healthy joints. Sodium Hyaluronate, or Hyaluronic Acid supports healthy joint function by lubricating joints and helping to maintain structural integrity. It also increases the viscosity level of the synovial fluid in joints. Fluid Action® HA contains Glucosamine, Yucca, MSM, Vitamin C, and many other beneficial ingredients.