A recent study suggests that calorie information do little more than waste menu space. The American Journal of Public Health divided 1,121 people into three groups, giving each different information. Two groups were given information on the recommended calorie intake per meal and per day, while the final group was given no information. Their purchases at a restaurant where calories are clearly displayed next to each menu item were then analyzed.
Researchers learned that the groups given information about calorie intake still consumed food that exceeded the suggested limit. That extra knowledge had zero influence on purchases, because people are going to eat what they want when they're hungry. They probably don't even care that some calorie counts are reportedly wrong, either.