Avoiding bunion surgery with Supartz Injections. Supartz is a non-surgical injection therapy that relieves pain in people with painful bunions. The solution is made up of highly purified, sodium hyaluronate (hyaluronic acid of HA). HA is a natural chemical found in your body in joint tissues and synovial fluid that fills your joints. Your body’s own HA acts like a lubricant and chock absorber in synovial fluid of a healthy joint. Arthritic bunions degrade the quality of synovial fluid. Supartz therapy adds highly purified HA to the joint, relieving pain and stiffness which can help you get back to your normal activities.