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Foods With Potassium. Research published in the American Journal of Physiology in 2007 found that high-potassium diets may help dilate blood vessels and reduce your risk of stroke. Although the results are not conclusive and further study is needed, it is important to get adequate potassium in your diet.
A pile of raw ginger on a countertop. Photo Credit bernjuer/iStock/Getty Images. Constriction of the blood vessels is the bodyâs way to raise the blood pressure. By narrowing the passage in the blood vessels, blood flows more slowly to the organs and the extremities. Certain foods may contribute to this process.