Better Homes and Gardens September 2012 page 174 Nutrition
"Chock it up
Go ahead and nibble a square off that stack. People who regularly enjoy chocolate weigh 5-7 pounds less than those who skip the sweet entirely, according to a study from the University of California, San Diego. Further research will explore the reason for the link, but why wait? An ounce or so a day makes a sensible treat. for a bonus nutrition boost, choose dark chocolate which is rich in heart-healthy antioxidants."