I have read that Vit D and K2 work synergistically together. (Oops. I just read David's post and he said the same

I came across this info which I found interesting: https://www.stoptheclot.org/vitamin-...ed-to-know.htm

"Warfarin (Coumadin) works by interfering with how your body uses vitamin K. The metabolism of warfarin (Coumadin), vitamin K, and vitamin K dependent clotting factors takes place in your liver. Warfarin (Coumadin) prevents the production of vitamin K dependent clotting factors. As a result, clotting occurs at a much slower rate. One good way to think about vitamin K and its importance while taking warfarin (Coumadin) is that you need to maintain a balance between the amount of vitamin K in your body and the amount of warfarin (Coumadin) prescribed by your healthcare provider."

Medical advice/monitoring as mentioned by others is very important.