Studies show parents armed with nutrition facts on fast food tend to choose healthier menu items.
Researchers at the University of Washington presented nearly 100 parents of three to six year-olds with picture menus from McDonald's, but only half were given calorie information.
The parents were then asked to choose what they would order for their kids and themselves.
Parents who had the calorie information chose an average of 102 fewer calories compared to the group without the facts.
Researchers say even a small reduction in calorie intake can help curb weight gain and obesity.
Some fast food restaurants already mandate that nutritional labeling be present on signs and menus.
The study was led by researchers at Seattle Children's Hospital and published in the Journal Pediatrics.
