Chocolate Protects Against High Blood Pressure, Stroke - ABC News

"Studies show that if people eat 25 grams a day, they will gain weight. Weight gain will lead to overweight and obesity, which has detrimental effects on blood pressure, heart disease, and even cancer, so we don't want that."

"the chocolate benefit was greatest among people who consumed about 7.5 grams of chocolate daily."

http://abcnews.go.com/Health/HeartDiseaseNews/chocolate-boasts-blood-pre
ssure-benefits/story?id=10243200

... Based on this, it seems to me that the thing to do is to eat one "mini"
"fun size" piece of dark chocolate just once per day.