Weight Regain Linked to Brain's Defense Mechanism, New Research Shows

weight regain brain defense mechanism appetite hormones obesity research Wegovy

Recent studies reveal that the human brain and body are biologically programmed to protect stored fat, making long‑term weight loss difficult. After dieting, hormones such as leptin fall while hunger signals like ghrelin rise, prompting increased appetite and a reduction in resting energy expenditure that exceeds what body size alone would predict. Researchers at the University of Copenhagen described this as a “defended body weight” system that can even “remember” a previous heavier set point and work to restore it.

Animal experiments at UT Southwestern Medical Center support the same concept. Mice that had been made obese and then returned to a normal weight displayed persistent hyperphagia when given free access to food, indicating that the drive to regain weight persists beyond the dieting period. The findings help explain why many people experience weight regain despite disciplined effort and why obesity medications such as Wegovy and Mounjaro, which mimic gut hormones, can temporarily curb appetite but may lose effectiveness once treatment stops.

Entities

Evan Rosen · Frankie Heyward · Mounjaro · Ozempic · UT Southwestern Medical Center · University of Copenhagen · Wegovy

Claims

What the coverage asserts, and how well corroborated each claim is across sources.

[● 2 SOURCES] Obesity drugs Wegovy and Mounjaro mimic gut hormones to reduce appetite. theshillongtimes.com · www.topsante.com
[○ 1 SOURCE] Mice previously made obese exhibit persistent hyperphagia when returned to free feeding. www.medicaldaily.com
[● 3 SOURCES] After weight loss, appetite‑stimulating hormones increase while leptin decreases, leading to stronger hunger signals. www.medicaldaily.com · theshillongtimes.com · www.topsante.com
[● 2 SOURCES] Resting energy expenditure falls more than expected after weight loss, contributing to weight regain. www.medicaldaily.com · theshillongtimes.com
[● 2 SOURCES] The brain can “remember” a previous higher body weight and act to restore it after dieting. theshillongtimes.com · www.topsante.com

Sources

Mouse Study Adds Evidence That Persistent Hunger, Not Willpower, Drives Weight Regain [www.medicaldaily.com]

6 days ago

Brain biology drives weight regain after dieting - The Shillong Times [theshillongtimes.com]

5 days ago

Vous reprenez du poids après un régime, votre cerveau pourrait y être pour quelque chose - Top Santé [www.topsante.com]

7 days ago