Yet those of us with artificial heart valves or stents and on warfarin are told to stay away from foods with Vitamin K, namely greens and such.
I believe vitamin K disrupts blood coagulation, and causes issue related to hematology for folks on certain blood thinners.
You brought up a great point, so I just posted another high-level study write up, here:
https://freerepublic.com/focus/f-chat/3882048/posts