Keep your joints lubricated for smooth, comfortable motion with Swanson Hyaluronic Acid Complex! Every moving part on every machine depends on proper lubrication to protect against wear and tear. The human machine is no different. Our joints depend on a substance known as synovial fluid to lubricate joint tissue surfaces, reducing friction to keep them gliding smoothly. The primary component of this synovial fluid is hyaluronic acid, making it an important nutritional resource for tissues throughout the body—not just for joint support!