A new, in-vivo German trial shows that even modest amounts of dark chocolate, consumed daily two hours after dinner, has positive effects on reducing high blood pressure. In comparing the consumption of dark vs. white chocolate (the latter not being chocolate at all), blood pressure was effectively lowered in the treatment arm of 44 adults aged 56-73.
I've written about chocolate before, and this new research just confirms that even tiny doses of cocoa flavonoids (under 30 calories /day!) benefit the circulatory system in many ways. Of course, I would recommend a bit more -- but as the study's authors comment, don't blow your calorie budget!