Our expert says:
In addition to drugs, there are many foods, which may cause problems because vitamin K cancels some of the effect of warfarin. Therefore, eating these foods may result in thicker blood:
- Foods with very high vitamin K content (more than 200 mcg) — Brussel sprouts, chickpeas, collard greens, coriander, endive, kale, liver, parsley, red leaf lettuce, spinach, Swiss chard, black or green teas, turnip greens, watercress.
- Foods with high vitamin K content (100-200 mcg) include basil, broccoli, butterhead lettuce, canola oil, chives, coleslaw, cucumbers (with peel), green onions, mustard greens, soybean oil.
- Foods with medium vitamin K content (50-100 mcg) include apples (green), asparagus, cabbage, cauliflower, mayonnaise, nuts (pistachios), summer squash.
- Foods with low vitamin K content (less than 50 mcg) include apples (red), avocados, beans, breads and grains, carrots, celery, cereal, coffee, corn, cucumbers (without the peel), dairy products, eggs, fruits, iceberg lettuce, meats/fish/poultry, pastas, peanuts, peas, potatoes, rice and tomatoes
I know these lists look imposing, but I also know that they are incomplete, and the effects of these things vary from patient to patient.
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