Aside from convenience, shelf-stability and price point, ultraprocessed foods rarely have any positives associated with them — especially when it comes to our health.

Now, a study from Virginia Tech suggests certain age groups might be more sensitive — specifically, a category of young adults.

In the study, researchers looked at two types of diets: one dense in ultraprocessed foods, where 81% of calories consumed came from these foods, and a second that contained no ultraprocessed foods at all. Participants adhered to each of the diets for two weeks, with a break in between, eating breakfast in the lab and then receiving meals prepared in a metabolic kitchen.

After each diet period, researchers brought participants to an all-you-can-eat buffet breakfast. Each participant received a tray filled with around 1,800 calories of breakfast food, from which they could eat as little or as much as they wanted. After 30 minutes, they were escorted to a room and asked to rate different snacks. After taking one bite of each snack presented, they were given the option to keep eating, or rest until the study was over.

While the difference in calorie consumption didn’t change across the study’s participants as a whole (folks as young as 18 and as old as 25), researchers noticed a difference between age groups.

Those 18 to 21 years of age consumed more calories after feeling full when they adhered to the ultraprocessed diet. In contrast, participants ages 22 to 25, who also ate an ultraprocessed diet for two weeks, did not.

This was a short-term study, but researchers point out the difference in caloric consumption can add up quickly over time.