Both are also available as supplements. Vitamin K2 products are also sometimes subdivided even further based on even slighter differences in their chemical form, named MK-4 through MK-13. The most ...
There are several forms of vitamin K used in supplements, including K1 (phylloquinone), a synthetic form of K1 called phytonadione, and vitamin K2 as MK-4 or MK-7. Vitamin K deficiency is very rare in ...