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According to a 2002 study by the Journal of the American Medical Association (JAMA), hypertension – otherwise known as high blood pressure – will affect nine out of 10 Americans in their lifetime, and is a risk factor for the leading cause of death: heart disease.

New research suggests that high blood pressure is on the rise for millennials, and although hypertension is typically diagnosed in middle-aged adults, a 2011 study by the University of North Carolina found that...