- Super Value!
- Promotes Bone Health,
- Dietary Supplement. Jarrow Formulas MK-7 is made via fermentation by Bacillus subtilis natto. MK-7 (Menaquinone-7) is an enhanced bioactive form of vitamin K2 found naturally occurring in Natto that is ten times better absorbed than K1 from spinach. MK-7 is responsible for the carboxylation of specific bone proteins needed for building bones.