A gel injection for the knee is often used when the joint loses some of its natural lubrication, which can happen with arthritis or cartilage wear., The gel acts as a lubricant and shock absorber 13 Types of Gel Injections for Knees Compared Joint Relief Institute Are Knee Injections Right for Me? Palmetto Bone and Joint Knee Viscosupplementation Complete Orthopedics & Podiatry A knee gel injection is used to improve lubrication inside the joint. In conditions like osteoarthritis, the natural synovial fluid that helps the knee glide smoothly can lose its protective How GELSYN 3 works Bioventus OA Knee Pain Relief