Watermelon rind has nutritional benefits too: Not only does it contain vitamins C and B6 (skin, immunity, and nervous system boosters), but it could also sweeten your sex life. In a 2008 study, Texas A&M University researchers found that watermelon rind has high concentrations of the compound citrulline, which your body converts into an amino acid that helps improve circulation and relax blood vessels—even down there. To salvage rinds, blend them into a fruit smoothie, or try sautéing and adding to a stir-fry. They’ll contribute a zucchini-like texture and a slightly sweet flavor.

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