https://www.naturalnews.com/2025-09-10-sleep-triggers-hormonal-cascade-build-muscle-sharpen-mind.html
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GH surges during sleep—particularly in REM and early non-REM phases—via two hypothalamic hormones (GHRH and somatostatin), which act as accelerator and brake. GH then signals the brain's locus coeruleus to regulate wakefulness, creating a self-balancing system..."