To encourage healthier food choices for children in fast-food restaurants, many initiatives have been proposed. This study aimed to examine the effect of disclosing nutritional information on parents' meal choices for their children at fast-food restaurants in South Korea.

An online experimental survey using a menu board was conducted with 242 parents of children aged 2-12 years who dined with them at fast-food restaurants at least once a month. Participants were classified into two groups: the low-calorie group (n = 41) who chose at least one of the lowest calorie meals in each menu category, and the high-calorie group (n = 201) who did not. The attributes including perceived empowerment, use of provided nutritional information, and perceived difficulties were compared between the two groups.

The low-calorie group perceived significantly higher empowerment with the nutritional information provided than did the high-calorie group ( P = 0.020). Additionally, the low-calorie group was more interested in nutrition labeling ( P < 0.001) and considered the nutritional value of menus when selecting restaurants for their children more than did the high-calorie group ( P = 0.017). The low-calorie group used the nutritional information provided when choosing meals for their children significantly more than did the high-calorie group ( P < 0.001), but the high-calorie group had greater difficulty using the nutritional information provided ( P = 0.012).

The results suggest that improving the empowerment of parents using nutritional information could be a strategy for promoting healthier parental food choices for their children at fast-food restaurants.