The 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 of vitamin K (specifically, vitamin K2) and vitamin D3 work together to promote healthy bones and cardiovascular health. All Windmill supplements are manufactured in the USA in an FDA-inspected facility whose GMPs (Good Manufacturing Practices) are independently verified by qualified certification organizations.