Robbyn:
I'm like Betty -- my Coumadin dosage is based on eating lots of vitamin K. Right after surgery, I was pretty scared about consuming much vitamin K. Then I realized that I needed it -- and was missing some things, like guacamole, asparagus, broccoli-rice casserole, etc.
What I've read about vitamin K is that about half of it is produced by bacterial in your intestinal tract. If you have good healthy flora there, you're already getting lots of vitamin K. If you have diarrhea, you're in trouble and may have a high INR. That's why diarrhea is listed as one of the potential causes of a high INR.
I have at least one, sometimes 2 containers of nonfat yogurt a day.
Info from Coumadin's mfr lists tomatoes as LOW in vitamin K, not high.
I eat at least one, usually 2 salads a day. If the salad is mostly iceberg, you don't get as much vitamin K as if it were a spinach or other dark leafy green lettuce. I try to mix a few baby spinach leaves in with my salad greens.
Ask your PCP or whoever monitors your INR levels for some brochures from Bristol Squibb-Myers about foods and Coumadin. I carry one in my purse to use when grocery-shopping. Showed it to a friend who recently got a St. Jude valve -- he and his wife didn't know that oils contain vitamin K.