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Mehmet Oz, MD, Cardiology, answeredJuicy watermelon rinds offer a high dose of cirulline amino acid, which helps dilate blood vessels, improving blood circulation. The easiest way to take advantage of watermelon rind health benefits is to blend a whole piece of watermelon with lime. If you’re in the mood for something with a little kick, add some gin or vodka to make it a heart-healthy cocktail.Helpful? 3 people found this helpful.