Natural Joint Lubrication: How to Keep Your Joints Healthy Liv Hospital Knee Osteoarthritis: Early Signs, Causes, Diagnosis, Treatment 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 Your knee isn't just a hingeit's a living, dynamic system built to move. Inside every healthy knee is synovial fluid, the natural lubricant that reduces friction, delivers nutrients to the cartilage, Promoting Synovial Fluid Production for Better Joint Health Knee Gel Injections (Viscosupplementation): Uses & Side Effects