Glucosamine sulfate and chondroitin sulfate are components of normal cartilage. Methylsulfonylmethane (MSM) is a naturally occurring sulfur compound. Support Joint And Cartilage Health.† Promote Mobility And Maintain Healthy Connective Tissue.† Reduces Pain From Osteoarthritis.†For additional information view the Supplement Facts panel.All Windmill supplements are manufactured in the United States in an FDA-inspected facility whose cGMP (current Good Manufacturing Practices) are independently verified by qualified certification organizations.Free of artificial colors flavors and preservatives Windmill is a trusted name that has been providing America with quality supplements for over 45 years.