Hyaluronic acid is a main component of synovial fluid. The joint cartilage needs hyaluronic acid to remain supple and nourished. Hyaluronic acid can bind around 6000 times more water than its own weight and increases the viscosity of the synovial fluid. In osteoarthritis, the body's own production of hyaluronic acid is already reduced due to ageing processes. An injection of high-quality hyaluronic acid can improve the gliding properties of the cartilage surfaces and reduce the abrasion of the cartilage in the joint.