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Vitamin K in Foods

Medically reviewed by Last updated on May 6, 2024.

What do I need to know about warfarin and vitamin K?

How much vitamin K should I eat while I take warfarin?

Eat the same amount of vitamin K each day. Do not change the amount of vitamin K you normally have from foods or supplements. This helps keep your INR at the same healthy level.

Which foods have vitamin K?

Dark green leafy vegetables have the highest amounts of vitamin K. Foods that contain vitamin K include the following:

What are other sources of vitamin K?

Multivitamins and other supplements may contain 10 to 80 mcg of vitamin K. These amounts can cause changes in your INR. Read the labels of any supplements you take. Do not take more than 1 supplement that contains vitamin K. Talk to your healthcare provider about the supplements you are taking.

When should I contact my healthcare provider?

When should I seek immediate care?

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.