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Pack in Potassium
Countering the effects of salt in your diet, this mineral helps flush sodium out of your system and, as a result, relaxes the walls of your blood vessels. A surprising source of potassium: raisins. A small 2012 study revealed that snacking on a handful of the dried fruit three times a day for 12 weeks lowered pre-hypertensive participants' systolic blood pressure by an average of 4.8 percent.