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- National Institutes of Health: Important Information to Know When You Are Taking: Coumadin and Vitamin K
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For a simple grass you can easily grow at home, wheatgrass generates a lot of buzz. Some proponents claim it can cure everything from the common cold to cancer, but there is no scientific evidence to support those claims. Even so, drinking the juice as a nutritional supplement is a good way to get essential vitamins, including a substantial dose of vitamin K. Because of its high vitamin K content, certain people, including those who take the anti-coagulant medication warfarin, should speak to their doctor before consuming wheatgrass.
All About Vitamin K
Vitamin K is a fat-soluble vitamin, which means your body stores excess amounts in the liver and in fatty tissue. The vitamin's main role is to support proper blood coagulation. Bacteria in your intestines make a small amount of vitamin K, and you also get it form your diet.
Vitamin K in Wheatgrass
Wheatgrass & Weight Loss
The daily value for vitamin K is 80 micrograms. A small 4-gram serving of wheatgrass contains 35 micrograms of vitamin K, which is 44 percent of the daily value. This is a moderate amount, but some powdered wheatgrass juice supplements can contain as much as 160 percent of the DV for vitamin K.
Vitamin K and Warfarin
People who take warfarin need to keep their vitamin K intakes as consistent as they can. Suddenly increasing your vitamin K intake by drinking wheatgrass juice can decrease the effectiveness of warfarin and increase your risk of developing a blood clot. The National Institutes of Health advises people who take warfarin to limit their intake of of foods that contain moderate amounts of vitamin K -- between 60 percent and 199 percent of the DV -- to three servings per day. Wheatgrass is considered a supplement and not a food, however. NIH cautions those who take warfarin to avoid supplements that list vitamin K on the label unless they have a doctor's permission.
- People who take warfarin need to keep their vitamin K intakes as consistent as they can.
- NIH cautions those who take warfarin to avoid supplements that list vitamin K on the label unless they have a doctor's permission.
Other Potential Issues With Vitamin K
Pomegranate Juice & Vitamin C
According to the University of Maryland Medical Center, vitamin K has few side effects at recommended intake levels 3. Wheatgrass can provide more than the recommended intake, however. As such, pregnant and breast-feeding women should not take wheatgrass without a doctor's consent. Vitamin K crosses the placenta and is present in breast milk.
- According to the University of Maryland Medical Center, vitamin K has few side effects at recommended intake levels 3.
Wheatgrass & Weight Loss
Pomegranate Juice & Vitamin C
Does Vitamin B12 Make You Lose Weight?
Wheatgrass for Brain Health
Wheatgrass & Menstruation
Benefits of Wheatgrass Shots
Side Effects of Wheatgrass Juice
Differences Between Wheat Germ & Wheatgrass
Vitamins That Increase Blood Flow
What Are the Benefits of Wheatgrass for Cholesterol and High Blood Pressure?
- American Cancer Society: Wheatgrass
- Memorial Sloan Kettering Cancer Center: Wheat Grass
- University of Maryland Medical Center: Vitamin K
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- Wheat grass cold pressed juice. FoodData Central. U.S. Department of Agriculture. Published April 1, 2019.
Jody Braverman is a professional writer and editor based in Atlanta, GA. She received a Bachelor of Arts in English from the University of Maryland, and she is a certified personal trainer, fitness nutrition specialist, and yoga teacher. She has written for various online and print publications, including Livestrong.com, SFGate, Healthfully, and Chron.com. Visit the writer at www.JodyBraverman.com.