If you are on the drug warfarin (also known as Coumadin), talk with your physician before you increase your greens intake. The drug works (both as a rat poison and a human blood-thinner) by crippling the enzyme that recycles vitamin K, which is involved in clotting your blood. If your system gets an influx of fresh vitamin K, which is concentrated in greens, you can thereby undermine the effectiveness of the drug. You should still be able to eat your greens, but your physician will have to titrate the dose of the drug to match your regular greens intake. Eating greens nearly every day may be
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