Jarrow Formula Ultra Joint Builder addresses total joint health by providing nutrients for proper cartilage formation, facilitating proper joint lubrication, and promoting a healthy inflammatory response within the joint. Hyaluronic Acid provides the matrix for joint lubrication (synovial fluid), skin hydration, and skin repair. Hyal-Joint hyaluronic acid has clinically documented bioavailability having been shown to increase synovial fluid and improve joint mobility. Chondoitin Sulfate is a major component of joint cartilage and is important in maintaining the structural integrity of this tissue. Glucosamin Sulfate is a stable, clinically studied form of glucosamine, which is essential for the proper formation of tendons, ligaments, synovial fluid, bones, skins, nails, and blood vessels. MSM is a sulfur donor; sulfur is essential for the formation of chondroitin sulfates. Bromelain is a protein digesting enzyme from pineapple that affects protein turnover in the body, including proteins found in joint tissue. Calcium Fructoborate (Fruitex-B) is a clinically documented, naturally occurring plant source of the trace mineral boron. Boron is essential for healthy bone and joint function.