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. Also, MK-7 promotes cardiovascular health by helping to maintain arterial elasticity. 

• Supports calcium uptake and bone mineralization*
• Supports healthy bones* -- Supports healthy cardiovascular function*
• Supports healthy kidney function* -- Supports healthy aging*
• Certified free of allergens by an independent, third-party lab
• All Best Naturals products are manufactured in accordance with Good Manufacturing Practices (GMP), among the highest standards in the world -- Proudly Made in USA -- Purity & Potency Guaranteed