Calorie labels may backfire when it comes to judging food healthiness, research shows

Knowing the calorie content of foods does not help people understand which foods are healthier, according to a study I recently coauthored in the Journal of Retailing. When study participants considered calorie information, they rated unhealthy food as less unhealthy and healthy food as less healthy. They were also less sure in their judgments.

In other words, calorie labeling didn’t help participants judge foods more accurately. It made them second-guess themselves.

Across...