A two-year randomized controlled trial published in the Journal of Circulation found that vitamin K2 supplements had no effect on reducing calcium buildup around the aortic heart valve.

For people with high coronary calcium scores (above 400), vitamin K2 supplements significantly reduced the progression of further calcium buildup in their blood vessels.

In a recent study, non-calcified plaque in blood vessels actually got smaller in the vitamin K2 group, while it grew in the placebo group.

The MK7 version of vitamin K2 is recommended because it is the most efficiently absorbed, has the greatest bioavailability, and stays in the body the longest.

A three-year study showed vitamin K2 improved bone strength, whereas a shorter 12-month trial did not, highlighting that bone-related studies require a long duration to see effects.

The speaker personally prefers a lower dose of 90 micrograms of vitamin K2 while waiting for more definitive research to establish the ideal amount.

The speaker takes 90 micrograms of vitamin K2 as part of a multivitamin and mineral supplement that they designed called microitamin.

Vitamin K2 supplements have important interactions with blood thinners, especially warfarin, so you must check with your doctor before starting them.