Our Glucosamine Sulfate provides you with 750 mg per caplet. Glucosamine sulfate helps deliver the building blocks joints need to maintain healthy cartilage and joints.? For additional formula information, view the Supplement Facts panel. All Windmill supplements are manufactured in the United States in an FDA-inspected facility whose GMPs (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 40 years.