Natrol Hyaluronic Acid with Chondroitin is a powerful joint-health product which helps maintain joint lubrication and supports synovial fluid. Natrol HA capsules combine three of the most important nutrients for supporting healthy joint lubrication. Hyaluronic acid is a naturally-occurring compound found in synovial joint fluid, vital for cushioning and lubricating joints. Chondroitin promotes lubricating fluids for your joints and cartilage. BioCell Collagen II hydrolyzed chicken sternal cartilage plays a vital role in the maintenance of cartilage, tendons and ligaments. Natrol HA capsules are gluten free. Natrol makes this product in the U.S.A.!