Naturally simple. Doctor's Best Natural Vitamin K2 features MenaQ7, a clinically validated and patented vitamin K2 as Mk-7. K2 is a superior form of vitamin K called menaquinones, which have shown greater bioavailability than the more commonly used vitamin K1. Purified from fermented chickpeas, this daily supplement is a great way to direct vitamin K2 to bones, blood vessels, and other soft tissues by assisting in the absorption of calcium.