American scientists revealed how deep sleep supports muscle, fat, and brain health. Researchers at University of California, Berkeley identified a brain circuit for sleep hormones.

Their findings show a feedback loop explaining insomnia’s negative effects on body systems.

Team believes this discovery could aid Alzheimer’s and Parkinson’s disease treatment strategies. Previously, it was known growth hormone surges mostly during deep non-REM sleep.

Experiments with mice identified hypothalamic neurons triggering hormone release affecting brain function. Experts emphasize this mechanism may inspire hormone therapies for sleep and metabolic disorders.