Which would do a better job of deciding whether to eat a half-cup serving of Chunky Monkey ice cream: knowing that it carries 300 calories and 18 grams of fat or that it would take 80 minutes of brisk walking to work it off? In a test, menus that included calorie counts didn’t change eating habits, but people who read menus that included walk times ordered less food and ate less, too. 

Read the story.