Well, I don't have a scientific study of anything to support my comments, just observations from years of working home health.
We draw a blood test on a lot of patients to measure the effectiveness of a blood thinner that people are put on for cardiac or circulatory problems. The medication has to be adjusted to keep it within a therpautic range of length of time to clot. It always seems in the summer, especially when tomatoes and other fresh fruits and veggies are in season that people have to take increasing doses of the medicine to keep their clotting times as long as theraputically necessary. Not all of them, but it happens enough to make you wonder. And the agent to counteract too much of the anticoagulant in your system is vitamin K.
So there could be something with that, aquariumfishguy!