Arugula is a leafy green that can give your salads and side dishes a nice peppery flavor while aiding in blood pressure control. It's low in potassium, which counteracts the negative effects of salt and helps kidneys to better control body fluid levels. Arugula is also a source of organic nitrates, a precursor to nitric oxide, which opens up blood vessels and promotes lower blood pressure while regulating multiple renal functions, including filtration and excretion.

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