Also known as "viscosupplementation", hyaluronic acid injections use the natural substance found in your body that acts as a lubricant and shock absorber in your joints. In individuals with osteoarthritis, the quality and quantity of this substance can diminish, leading to joint pain and stiffness. By injecting hyaluronic acid directly into the joint, it can help restore your joint's normal function, reduce pain, and improve mobility. The effects can last several months.