Ask the doctor: Do people on warfarin need to avoid vitamin supplements that contain vitamin K?
Ask the doctor
It's a common misconception that people who take warfarin must avoid vitamin K, which is abundant in green, leafy vegetables such as kale, parsley, Brussels sprouts, broccoli, and collard, spinach, beet, and other greens. The body needs vitamin K to keep bones strong and healthy. There's also some evidence that vitamin K helps control calcification in blood vessels, an important step in atherosclerosis. What's important is keeping vitamin K intake consistent from day to day.
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