Gel knee injections, also known as viscosupplementation, are a treatment option for knee osteoarthritis. * Hyaluronic acid acts as a lubricant and shock absorber, allowing the bones to move smoothly over each other and reducing friction. * In osteoarthritis, the synovial fluid becomes thin and less viscous, leading to increased friction and wear on the cartilage. * Injecting hyaluronic acid aims to restore the natural lubrication and cushioning properties of the joint fluid, reducing pain and im