Jarrow Formulas - MK-7 for Bone and Cardiovascular Health 90 mcg. - 90 Softgels Jarrow Formulas MK-7 is naturally made via fermentation by Bacillus subtilis subsp. natto and is much better absorbed than K1 from spinach. MK-7 is a longer-acting form of vitamin K vs. K1 and MK-4 and better supports ca