It is confusing when doctors don’t agree. Ask your doctors to talk to each other to reach a consensus on whether or not you should take a supplement with vitamin K. Until then, caution would be the better choice and not take a supplement with vitamin K. Ask a pharmacist at your favorite store for their recommendation of a supplement without vitamin K.
The biggest issue with coumadin and vitamin K is you need to eat a consistent amount of vitamin K containing foods every day. In other words, one day, don’t eat lots of green leafy vegetables and the next few days go without. It would be more difficult to regulate your clotting time with varying vitamin K intakes. Go back and read the vitamin K topic as there is a list of high vitamin K foods. Try to eat about the same amount of vitamin K every day.