Vitamin K Consistency Calculator
On warfarin, the usual advice is consistency, not avoidance. Build a typical day, save it as your usual, then check any other day against it — the number to watch is the change.
Not medical advice. This tool only adds up vitamin K in foods. It gives no dosing advice and does not replace INR monitoring. If you take warfarin or another anticoagulant, consult your clinician or anticoagulation clinic before changing your diet.
| Food | Servings | Amount |
|---|
Vitamin K in this day
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Saved on this device only.
Common questions
Do I have to avoid vitamin K foods on warfarin?
Usually not. Standard guidance for people taking warfarin is to keep vitamin K intake consistent from day to day rather than avoid it, because sudden changes can affect how warfarin works. Your clinician or anticoagulation clinic sets the plan — this page doesn't.
Which foods are highest in vitamin K?
Dark leafy greens — kale, spinach, collards, turnip greens — lead by far, followed by broccoli, Brussels sprouts and some vegetable oils. One cooked serving of greens can carry several times the daily adequate intake.
Does this apply to DOACs like apixaban or rivaroxaban?
No. Vitamin K consistency matters for warfarin (a vitamin K antagonist). Newer anticoagulants work differently — ask your clinician what applies to you.
Method & sources
Vitamin K (phylloquinone, mcg) per serving comes from USDA FoodData Central per-100 g values multiplied by the listed serving. The comparison is simple arithmetic: (this day − usual day) ÷ usual day. Adequate intake for reference: 90 mcg/day for women, 120 mcg/day for men. Cooking method, portion size and supplements also change intake. This page doesn't judge what change is safe; that's for your clinician.
- NIH Office of Dietary Supplements — Vitamin K fact sheet (includes warfarin interactions)
- USDA FoodData Central
The ranking: vitamin K foods · all foods