THREE CATEGORIES OF VITAMIN K Vitamin K1 Vitamin K2 Vitamin K3 (menadione) This is a synthetic form of vitamin K that is not recommended. (WARNING: Don’t take a Vitamin K supplements without your physician’s approval if you are taking an oral anticoagulant such as Coumadin and Warfarin.) Vitamin K1 (phylloquinone) This type of vitamin K is important […]