Knee Joint Wear and Tear, Knee Joint Pain, Restoring Joint Lubrication Function Injectable Hyaluronic Acid, Knee Pain Relief Made in China.com A gel injection for the knee helps improve joint lubrication when natural synovial fluid becomes thinner or less effective, which often happens with arthritis., This gel acts as a cushion and Viscosupplementation injections for knee pain relief 7 Ways to Lubricate Joints Naturally for Less Pain Fluid Lubricates Joints Biological Strategy AskNature