It's easy to get answers about health and nutrition! Just send your question by email to [email protected] 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, CCMS | Terms of Use | Privacy Policy



Ask Dr. Gourmet

Q: Does soy interrupt the effectiveness of Coumadin?

I have been taking Coumadin for 3 years now and would like to start adding soy to my diet due to post-menopausal vaginal dryness. Does soy interrupt the effectiveness of Coumadin?

A: Dr. Gourmet Says...

There doesn't appear to be enough Vitamin K in soy beans or other soy products to cause an interaction with Coumadin. Soybean oil does have small amounts of Vitamin K and can be of concern, but this would be in higher doses. Overall, you should be safe to add soy to your diet. Make sure that when you are adding soy products that you and your doctor monitor your INR levels carefully.

The concern with soy supplements for menopause is that there is no regulation and you don't have much idea what is being put in them. There may be any number of other compounds that might have an effect on the Coumadin you are taking. Interestingly, the research for soy in menopause is very disappointing. In one analysis of many research trials, soy products only had a 45% improvement in symptoms for women (this was not much better than placebo).

Thanks for writing. Eat well, eat healthy, enjoy life!

Timothy S. Harlan, MD, FACP, CCMS
Dr. Gourmet

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Coumadin Book

This indispensable book includes:

• A primer on WHAT a Mediterranean-style diet is and WHY it's great for you
• 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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Note: This is a revised and updated version of Dr. Harlan's The Dr. Gourmet Diet for Coumadin Users. These are the same recipes with updated Nutrition Information, with the addition of information on a Mediterranean-style diet.

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 (PDF) or $12.95 for the paperback. Get your copy now!