What's inside kale, and where does it go in your body?
A cabbage-family green rich in vitamin K, vitamin C, carotenoids and calcium that's absorbed relatively well.
Notable for
Vitamin K, vitamin C, vitamin A (as carotenoids), calcium, potassium.
Warfarin note
Very high in vitamin K, which interacts with the blood thinner warfarin. People taking it should follow their clinician's dietary advice.
Evidence & sources
Leafy greens such as kale are among the richest food sources of vitamin K. Evidence: established. Known: Listed in the NIH food-source table. Unknown: People taking warfarin should keep vitamin K intake consistent and talk to their clinician. Source: NIH Office of Dietary Supplements, Vitamin K Fact Sheet for Health Professionals (Current revision).