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Photo Modified: Flickr/Peter Massas /CC BY-SA 3.0

Grapefruits rank low in pesticide contamination. If there are pesticides, they are in the peel. Make sure you buy organic grapefruits if you plan on using the peel.  Some benefits of consuming grapefruits include weight loss, hydration, lower stroke risk, reduced risk for high blood pressure, improved digestion, and they can even combat free radicals known to cause cancer (medicalnewstoday.com).