There's lots on the web, but here's something very brief:

http://health.clevelandclinic.org/20...take-warfarin/

On the K2 added to D3, I first heard about this at a lecture by one of our integrative MD's here in my town. This was about 3 yrs ago. I had been taking D3 but started my search on K2 and started adding. I now take most days 100mcg K2, various brands. A friend and I were talking and she is sorry she didn't jump on K2 sooner, but she is now.

I never knew the benefits of it until recently. K2 directs our oral calcium into the bones and teeth, and away from joints, soft tissues, and arteries, etc. That in itself is enough, but it has other attributes as well. Cancer preventative, etc..

One thing a doc said was: currently, likely all of us are K2 deficient (it’s not stored in the body) and we don’t find out until heart problems develop or a hip needs replacing.

(There's no good blood tests yet to determine low amounts). Without K2, calcium gets deposited into blood vessels and soft tissues (bone spurs) and/or joints. As we age, we become stiff and ‘calcified’. K2 will begin to remove those deposits. (The calcification/ hardening of our bodies was what caught my attention).

Thinking more on this and bone spurs, that is what pushed me to the hip replacement as xrays showed bone spurs on my right groin....Could be due to the K2 absence.

Likely all of us are K2 deficient (it’s not stored in the body) and we don’t find out until heart problems develop or a hip needs replacing.

So much to learn, so much to know and if we are fortunate enough to be at the right places at right times, we can help ourselves.

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.