Joint health and mobility. 33 mg per capsule. Nutritional supplement. Swanson Hyal-Joint provides support necessary for smooth comfortable movement. Our joints depend on substance known as synovial fluid which lubricates the surfaces of joint tissues reducing friction. The main component of this synovial fluid is hyaluronic acid. main ingredient of Hyal-Joint. Hyal-Joint is an important source of nutrition for tissues throughout the body , and not just to support joints!