Our Vitamin K formula provides you with 100 mcg of Vitamin K-2 (as Menaquinone-7) and 1,000 IU of Vitamin D-3 per Tablet. The combined effect between vitamin K (specifically, vitamin K2) and vitamin D3, work with each other to promote healthy bones and cardiovascular health.? 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.