Get the Coumadin Diet Plan and Cookbook!

Coumadin Book

This indispensable book includes:

  • 6 weeks of complete meal plans, with shopping lists
  • 95+ delicious Coumadin safe recipes
  • Information about managing your diet on Coumadin
  • Ingredient and cooking tips throughout the book
  • Complete Nutrition Facts, including Vitamin K content, for each recipe

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How Much Vitamin K is in...?

Find out the exact amount of Vitamin K (in micrograms) of almost a thousand common foods! Listed both alphabetically and then in order of the amount of Vitamin K in the food, this list will help you know exactly how much Vitamin K you're eating. Just $4.95 for the eBook or $12.95 for the paperback book! Shop now!

It's easy to get answers about health and nutrition! Just send your question by email to and Dr. Harlan will respond to selected questions of general interest. Answers will be posted in the Ask Dr. Gourmet newsletter (sign up now!) and archived in the Ask Dr. Gourmet section of the website.

Please note that the Ask Dr. Gourmet feature is restricted to questions regarding food and nutrition. Due to the many questions we receive, not all questions may be answered. For more specific questions about your individual health, please contact your doctor. About Timothy S. Harlan, MD, FACP | Terms of Use | Privacy Policy


Ask Dr. Gourmet

Is wheatgrass juice or sweetpea green juice safe for those taking Coumadin (warfarin)?

I have recently begun taking wheatgrass (1-2 oz daily) and sweetpea green (1-2oz daily) juice(s) along with carrot/celery juice (1-2 carrots + 1-2 stalks of celery). My wife takes 2-3mg of Coumadin daily. Can she join me in benefits of these juices, perhaps in small degrees?

Dr. Gourmet Says...

an electric juicing machine with a glass of green liquid

Wheatgrass is an interesting item. Folks really believe that it has properties that are far beyond what the claims could possibly provide. There's no science to back up such claims unfortunately. I have repeatedly tried to find the nutritional content and what information is available is deemed unreliable by most sources (mostly because it is not considered a food source).

It doesn't appear to be harmful - but then again there's no research to show that it might be good for you, either.

Sweet pea green juice has even less information.

As such it's hard to give you a good solid evidence-based recommendation on these. As a foodie and one who loves flavor I don't find them palatable and they are certainly an acquired taste.

Carrots do have a medium amount of Vitamin K and this could be an issue if she is not consistent. Two medium carrots come in at a pretty reasonable 16 micrograms (mcg). Adding that to the celery, which also is a bit higher at 12 mcg per stalk, and the juice comes in at 40 mcg. That's about half the RDA. Here's a column I wrote on The Right Dose of Vitamin K.

One key is consistency, however, and having the juice each and every day makes this safer, but check with her physician to make sure that her INR is monitored.

Thanks for writing,

Timothy S. Harlan, MD, FACP
Dr. Gourmet