How Do These Knee Osteoarthritis Injections Work? Normal joint fluid contains a substance called hyaluronan. It acts like a shock absorber and lubricant in your joint and is needed to help the ...

When you have osteoarthritis (OA), the hyaluronic acid in the affected joint thins. Hyaluronic acid injections add to your body's natural supply. You may hear your doctor refer to these injections ...