hello-my father is on coumadin (almost died of a AAA). we were discussing that his levels fluctuate because of fresca soda or maybe some sprite/7up he drinks. would this have a major factor on his med. also when you discuss cola-does root beer fall in this category.
Dr. Gourmet Says...
The USDA reports that Sprite® contains no Vitamin K at all. Their database doesn't contain information on Fresca® but there is information on many other types of soda. Cola, with or without caffeine as well as with or without sugar, does not have any Vitamin K.
The same is true for cream soda, club soda, ginger ale, grape soda, Dr. Pepper®, orange soda, root beer and tonic water.
It appears that users of Coumadin® (warfarin) would be safe drinking soda. That said, soda is not a good choice for a healthy diet. Drinking a cola or root beer occasionally is fine and one should choose sugar free products. There is plenty of research now that shows how much better other beverages can be for your health. Choose water, juice, tea, coffee or green tea instead.
Thanks for writing,
Timothy S. Harlan, M.D.
Dr. Gourmet
Eat well, eat healthy, enjoy life!
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How Much Vitamin K is in....?
There's an easy way to find out about the nutrition content of any food. Just use The Quality Calorie Diet Software.
Just register to use the software, then click the Recipe Box tab. The ingredient database includes over 7,000 ingredients and will show you the nutritional information for those ingredients - including Vitamin K. Use the Food Diary section to help you track your daily Vitamin K intake along with calories and other nutrients. Try it now!

