Which foods are high in vitamin K if I take warfarin?

Kale, spinach, broccoli, and liver are very high in vitamin K; lettuce in large salads, avocado, and green tea in large amounts are moderate to high — keep all these steady week to week.

Can I eat spinach if I take warfarin?

Yes, you can eat spinach on warfarin, but keep your portions steady week to week — don't suddenly start eating large amounts daily if it's not currently part of your regular diet.

What foods should you absolutely avoid on warfarin?

Avoid cranberry juice (can raise bleeding risk) and St John's Wort (reduces warfarin's effectiveness). Most other foods don't need avoiding — consistency in vitamin K intake matters more than avoidance.

Free tool

Can I eat this with Warfarin?

Warfarin works against vitamin K. Sudden changes in vitamin K intake swing your INR — consistency matters more than avoidance.

Also sold as Coumadin, Marevan. Brand names from the NHS Dictionary of Medicines and Devices.

Type any food below for an instant verdict — we check 121 foods and drinks for Warfarin (17 to avoid, 92 to take care with) — or tap one below.

Quick answers

Which foods are high in vitamin K if I take warfarin?: Kale, spinach, broccoli, and liver are very high in vitamin K; lettuce in large salads, avocado, and green tea in large amounts are moderate to high — keep all these steady week to week.
Can I eat spinach if I take warfarin?: Yes, you can eat spinach on warfarin, but keep your portions steady week to week — don't suddenly start eating large amounts daily if it's not currently part of your regular diet.
What foods should you absolutely avoid on warfarin?: Avoid cranberry juice (can raise bleeding risk) and St John's Wort (reduces warfarin's effectiveness). Most other foods don't need avoiding — consistency in vitamin K intake matters more than avoidance.

Grounded in the checker below and the full guide. Not a substitute for your pharmacist.

1 · What do you take?

Warfarinalso coumarin, vitamin k antagonist, Coumadin

Warfarin works against vitamin K. Sudden changes in vitamin K intake swing your INR — consistency matters more than avoidance.

You do not need to avoid vitamin K foods — you need to keep your intake steady week to week. Sudden binges or sudden cuts are what destabilise INR. Tell your anticoagulation clinic about any major diet change.

Read our full Warfarin guide →

2 · What do you want to eat or drink?

Tap a food to see the answer, or type any food or drink in the box above.

Foods to avoid with Warfarin· 17

Take care with Warfarin· 92

Fine with Warfarin· 12

Get the full warfarin food guide by email

The complete warfarin list — safe swaps, portion notes, and the freshness rules that matter — plus first access to the FreshPlate app, which checks every recipe against your medications automatically.

Free forever. Unsubscribe any time.

This checker summarises published guidance (NHS medicine pages, patient information leaflets and drug labels) for general information only. It is not medical advice, it is not exhaustive, and it cannot account for your dose, kidney function, other medicines, or health conditions. Always follow your prescriber, pharmacist, or the patient information leaflet — especially before changing what you eat or drink. See our editorial policy.

Food groups that matter with Warfarin

Every medicine each one affects, on one page.

Affected by the same foods as Warfarin.