Ask the doctor: Do people on warfarin need to avoid vitamin supplements that contain vitamin K?
Ask the doctor
It's a common misconception that people who take warfarin must avoid vitamin K, which is abundant in green, leafy vegetables such as kale, parsley, Brussels sprouts, broccoli, and collard, spinach, beet, and other greens. The body needs vitamin K to keep bones strong and healthy. There's also some evidence that vitamin K helps control calcification in blood vessels, an important step in atherosclerosis. What's important is keeping vitamin K intake consistent from day to day.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise
I'd like to receive access to Harvard Health Online for only $4.99 a month.
Sign Me UpAlready a member? Login ».
Disclaimer:
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.
No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.
