On the left is one small, fat-free, no-sugar-added muffin. On the right is a cornucopia of food--several pounds of fruit and a pair of whole-wheat rolls. The calorie counts are identical: 720. There sits Dr. Howard Shapiro's point: dieters imagine that they're saving calories by eating the "virtuous" snack on the left, whereas in reality they're depriving themselves of the mountain of food on... (read more)