IMPORTANT JOINT LUBRICANT*: Hyaluronic acid is a compound present in every tissue of the body, with the highest concentrations occurring in connective tissues such as skin and cartilage.* WITH MSM: MSM was added to this product as a natural sulfur compound, offering the chemical links needed to form and maintain connective tissues in the human body including articular cartilage.* JOINT SUPPORT*: Hyaluronic acid is an important constituent of joint fluid, where it serves as a lubricant and plays a role in resisting compressive forces.* GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation). Packaged in the USA by a family owned and operated company since 1968.