This is among the most high potency sources of vitamin K2 available. Curiously, the Life Extension people have chosen to have it packaged with vitamin K1.

Because there are little data to tell us to know which specific form of vitamin K2 is best (MK-2, MK-7, MK-11), perhaps this mixture of K2 forms stacks the odds in favor of getting it right.

Please be aware that anyone taking warfarin (Coumadin®) should discuss the use of vitamin K supplements with their physician before starting, since protimes (INR) will be significantly affected.