Biological and behavioral factors drive late-night food cravings

Research indicates that approximately one-third of adults snack nightly after dinner, a figure rising to 80 percent among young adults aged 18 to 24. Experts suggest these cravings are driven by biological mechanisms rather than a lack of willpower.

Prof James Betts from the University of Bath notes that ghrelin, the hunger hormone, typically rises later in the day. While meals suppress ghrelin, this effect is significantly more pronounced after breakfast than after lunch or dinner. Additionally, the brain’s reward system increases the desire for calorie-dense foods in the evening, independent of actual energy needs.

Dietitian Dr. Kristine Beaulieu warns that eating within two hours of sleep increases the risk of weight gain and obesity. To mitigate cravings, experts recommend evening meals rich in protein and fiber to promote satiety. Other contributing factors include established habits, such as snacking while watching television, and the fear of waking up hungry during the night.