Jarrow Formulas MK-7 is made from fermentation by Bacillus subtilus natto. MK-7 (Menaquinone-7) is an enhanced bioactive form of vitamin K2, also known as Menaquinone. MK-7 from Natto is ten times better absorbed than K1 from spinach. MK-7 is responsible for the carboxylation of specific bone proteins needed for building bone. MK-7 also promotes cardiovascular health.










