Aims
Exploring a novel theory from nutritional ecology, this multidisciplinary study paves the way for new approaches to address the drivers of overeating behaviours. It utilises clinical data from individuals with Binge Eating Disorder (BED) or Bulimia Nervosa (BN) to investigate whether the Protein Leverage Hypothesis (PLH) – which posits insufficient protein intake as a key driver of overconsumption and loss of dietary control – may help to explain binge eating. The findings may inform updated dietary guidelines, adjunctive eating disorder treatments like protein supplementation, and policy reforms targeting low-protein ultra-processed foods.

Background
Binge eating is a key driver of excessive weight gain, and highly comorbid with overweight and obesity. It has largely been conceptualised as a psychological illness. However, there is emerging evidence to suggest that the behaviour may be influenced by inadequate levels of protein intake and thereby addressed more systemically.