Joint Fluid Supplementation: Restoring Knee Lubrication Naturally Campbell Health Center Knee Gel Injections (Viscosupplementation): Uses & Side Effects Knee Injections: Your Path to Pain Free Mobility Peter Howard How to Increase Grease in Knees Naturally? Joint fluid fills the small space between the ends of bones and acts like a natural lubricant. The synovial membrane creates this thick, silky fluid using long molecules that hold water and give it a