The diminutive blueberry may be a powerhouse food for cardiovascular health. That was the conclusion from a new clinical trial that tested if a daily dose of blueberries could lower blood pressure. For this study 48 women with mild to moderate high blood pressure were given the equivalent of one cup of blueberries daily in the form of a freeze-dried blueberry extract or placebo (fake) extract. After two months, systolic blood pressure dropped by a striking seven points, while diastolic pressures decreased by five points in the blueberry extract eaters. For those consuming the fake extract, neither numbers budged a bit.  As an additional heart-healthy bonus, in those consuming the real extract, arteries became more pliable and less stiff relative to when the study began.