HMN 2025: How New findings join biological and behavioral penalties of weight reduction to binge-eating

A review from Florida State University uncovers biological and behavioral penalties of weight reduction underlying binge-eating in girls with bulimia nervosa and associated syndromes. The work is published within the journal Psychological Medicine.

Led by Pamela Keel, Robert O. Lawton Distinguished Professor in FSU’s Department of Psychology, the research reveals the roles of the hormones leptin and GLP-1 (glucagon-like peptide 1) in understanding extreme meals consumption in binge-eating amongst girls.

“When any individual loses weight, they put themselves on this ‘psychobiological bind,'” Keel mentioned. “We stay in a tradition that values weight reduction, so psychologically, you are motivated to maintain the burden off. But biologically, your physique shouldn’t be designed to keep up that weight reduction. Caught between a need to be skinny and powerful urges to eat extra meals, weight suppression may lure folks in cycles of binging and purging.”

The study highlights the idea of weight suppression—the distinction between an individual’s highest and present weight—and the way it impacts hormone ranges.

The researchers discovered that larger weight suppression is related to decreased ranges of leptin, and decrease leptin was additional related to decreased launch of the naturally occurring hormone GLP-1 after consuming. Both hormones play key roles in urge for food regulation.

Leptin, primarily launched from fats tissue, alerts the mind in regards to the physique’s power reserves, whereas GLP-1, secreted by the intestinal tract in response to meals consumption, helps sign the mind when sufficient meals has been consumed. The study confirmed that decrease GLP-1 response was related to needing to eat extra meals to really feel satiated, which was linked to extra extreme binge episodes.

“Prior to this analysis, the center of the equation—GLP-1 and satiation deficits—was utterly lacking, and that lacking half is essential for advancing remedy for bulimia and associated problems,” Keel mentioned.

Implications for remedy

The analysis underscores the significance of assessing weight historical past along with present weight in sufferers with consuming problems and reveals that medication that have an effect on GLP-1 receptor agonists, initially accepted by the FDA for sort 2 diabetes, and extra just lately, for weight reduction, may have potential purposes in managing binge-eating.

“Our study presents novel insights as the primary undertaking to hyperlink the biological penalties of weight reduction, specifically decrease leptin and decreased GLP-1, to consuming bigger quantities of meals, which is a core function of binge-eating,” mentioned co-author Lindsay Bodell, a professor within the Department of Psychology at Western University in Ontario, Canada. “These findings mark to new instructions for remedy, providing hope to these affected by consuming problems.”

The article additionally discusses the necessity for additional investigation of GLP-1 remedy misuse as an consuming dysfunction symptom and describes cognitive-behavioral remedy as a first-line remedy for bulimia and associated problems.

The study included almost 400 girls of varied weights with a spread of consuming problems involving recurrent binge-eating, in addition to girls with out consuming problems. This strategy was designed to establish mechanisms underlying binge-eating throughout diagnoses of anorexia, bulimia, binge-eating dysfunction and different specified feeding and consuming problems to have the broadest influence doable.