The causes of obesity are complex and influenced by many factors. While research has highlighted connections between sleep, eating patterns and weight gain, scientists remain uncertain of the role of the circadian system — the biological clock — in shaping eating patterns. 

 But a new study from researchers at the Warren Alpert Medical School of Brown University and Mass General Brigham reveals a distinct relationship between circadian rhythms, weight and eating habits in adolescents, a vulnerable age group whose eating patterns influence their lifelong health. The study found that adolescents whose weight was classified as “overweight” or “obese” consumed more calories later in the day compared to participants with healthy weights.