Scientists Find Hormone That May Prevent Anorexia Relapse

A major discovery about hunger hormones could transform how doctors help people recover from anorexia nervosa and stay healthy long term.

Scientists at Penn Medicine Princeton Health tracked 30 women through a four month eating disorder treatment program. They measured two key substances: ghrelin (the hormone that tells your brain it's time to eat) and LEAP2 (a protein that blocks ghrelin from working).

The results revealed something remarkable. Patients who successfully maintained their weight after treatment showed balanced hormone levels and better impulse control. But those who relapsed saw their LEAP2 levels spike back up, essentially blocking their natural hunger signals again.

"In the absence of access to food, the brain adapts by not expecting as much reward from food," explains Dr. Rebecca Boswell, director of the Princeton Center for Eating Disorders. Through proper nutrition and treatment, the brain can relearn that reward sensitivity.

The hormone changes happened alongside this mental healing process. When patients went through refeeding treatment (gradually increasing calories for malnourished people), their LEAP2 levels dropped by 20 percent as they gained weight. Their bodies were literally relearning how to respond to food normally.

This doesn't mean the hormones cause relapse on their own. Recovery involves biological, psychological, and social factors working together. But the findings show another way the body and brain stay connected throughout healing.

The Ripple Effect

This research could change eating disorder treatment in profound ways. Instead of relying only on weight as a success measure, doctors might soon test hormone levels to see how well someone is truly recovering.

Dr. Boswell calls this potential biomarker a "game changer" for personalizing care. It could help doctors identify who needs extra support before relapse happens, not after. The approach would also move treatment toward a more science based, weight inclusive model.

Up to 4 percent of women experience anorexia during their lifetime, and it remains one of the deadliest mental health conditions. Better tools to predict and prevent relapse could save countless lives.

The research builds meaningfully on existing studies about how malnutrition affects brain chemistry. Animal studies confirmed that these hormonal shifts are directly tied to nutritional status, strengthening the human findings.

Future treatments might include hormone monitoring alongside therapy and nutrition counseling, giving patients and providers more information to guide recovery decisions.