UltraCruz® Equine Advanced Joint Supplement for Horses a horse joint supplement that provides key ingredients in a balanced formula designed to support healthy joints and connective tissue in horses. Our specially formulated equine joint supplement provides the following key active ingredients: Chondroitin Sulfate and Glucosamine work together to support new and existing cartilage. Hyaluronic Acid (HA) is a component of synovial fluid in the joint capsule and surrounding supportive tissues, and helps to lubricate the joint by increasing the synovial fluids viscosity. MSM (Methylsulfonylmethane) is a source of sulfur that has been shown to provide building blocks for cartilage. Other ingredients, including Boswellia and Cetyl Myristoleate may help support a healthy inflammatory response and may help relieve occasional stiffness in joints.