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

Get the Coumadin Cookbook!

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!


Ask Dr. Gourmet

Is there a Vitamin K difference between hot-house and home-grown tomatoes?

My father has been on Coumadin for 4 weeks and his doctor told him he could not eat home-grown garden tomatoes - just hot-house tomatoes! From viewing your website, tomato is low in vitamin K, so what is the deal?

Dr. Gourmet Says...

5 fresh tomatoes on the vine

I must admit that I very much enjoyed your question. My first reaction was that tomatoes are tomatoes, but when answering Ask Dr. Gourmet questions I always want to make sure that the reply is correct. As I wasn't 100% certain that a tomato is a tomato when it comes to Vitamin K content, I consulted some experts at the USDA.

I was referred to Dr. Sarah L. Booth who is the Director of the Vitamin K Laboratory at the Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University. She very graciously replied to your question. Here is her answer:

From the standpoint of vitamin K, I cannot point to any data that would support the recommendation to avoid home grown tomatoes. Tomatoes have very little variation in terms of vitamin K, so I would recommend eating tomatoes regardless of their source.

A four ounce tomato has about 9 micrograms of Vitamin K which is considered a low amount. As Dr. Booth says, there's no reason that your father's homegrown tomatoes would be higher in Vitamin K.

Thanks for your very interesting question.

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