Don’t stress about indulging in that sweet treat.
Overeating is a widespread problem, with experts forecasting that almost half of American adults will be obese by 2035.
Yet, science offers insights into why we often crave snacks even after enjoying a full meal — and it often has nothing to do with willpower.
A recent experimental study sought to clarify why so many individuals struggle to maintain a healthy weight, often seeking additional food despite having consumed a meal.
Researchers from the University of East Anglia (UEA), whose findings were published in the journal Appetite, found that the brain still reacts to enticing food signals even after we feel satisfied.
During the study, over 70 participants underwent Electroencephalogram (EEG) scans while engaging in a reward-based learning game featuring foods like sweets, chocolate, chips, and popcorn.
Midway through, participants were served a meal of one of these foods until they were adequately full, and no longer desired the food.
However, their brain activity told a different story.
The electrical activity in brain regions related to reward continued to respond robustly to images of food that participants no longer desired, even after they felt full.
“No amount of fullness could silence the brain’s reaction to appealing food,” stated lead researcher Dr. Thomas Sambrook from UEA’s School of Psychology in a press release.
This implies that food cues might provoke overeating even when hunger is absent,” he continued, labeling it a recipe for overeating.
The researchers suggest that over time, we have associated certain foods with pleasure, leading our brains to react to food cues as ingrained habits.
Another factor contributing to overeating may involve distractions during meals, resulting in feelings of dissatisfaction and prompting individuals to seek “hedonic compensation” — a way to replace lost pleasure with extra gratification.
This means our brain responses operate like automatic conditioned responses rather than deliberate choices.
The study also indicated that even individuals with strong self-control struggle against these instinctive brain reactions to food valuation.
This suggests that the issue of overeating may be less about self-discipline and more about the brain’s inherent wiring.
“The rising rates of obesity aren’t solely related to willpower,” Dr. Sambrook concluded. “They highlight how our food-rich surroundings and conditioned responses to enticing cues can overwhelm the body’s natural controls over appetite.”
