
Vitamin K is a family of chemically related substances called naphthoquinones. There are two major types of vitamin K that are important for humans: K1 and K2. Vitamin K1 (phylloquinone or phytonadione) is a natural nutrient found in green leafy vegetables. Vitamin K2 (menaquinones or MKs) in foods are mostly in the form of MK4 […]