" Beware of the health halo. The better the food, the worse the extras. People eating ‘low-fat’ granola ate 21 percent more calories, and those eating ‘healthy’ at Subway rewarded themselves by ordering cheese, mayo, chips, and cookies. Who really overeats—the guy who knows he’s eating 710 calories at McDonald’s, or the woman who thinks she’s eating a 350-calorie Subway meal that actually contains 500 calories? "

― Brian Wansink , Mindless Eating: Why We Eat More Than We Think