Vitamin K is the umbrella term for a family of fat - soluble compounds that include phylloquinones and menaquinones, which play an important role in various bodily functions.
While many people think of vitamin K as a single vitamin, it may come as surprise that vitamin K is actually a group of fat - soluble vitamins that includes phylloquinones (K1), menaquinones (K2), and menadione (K3).