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Peptides and Sleep

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Galanin: The Sleep-Promoting Peptide

Galanin neurons in the VLPO drive NREM sleep, regulate appetite, modulate pain, and influence cognition. The full research evidence landscape explained.

19 min read|Mar 20, 2026

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Peptides and Sleep

Growth Hormone Peptides and Sleep: The Deep Sleep Link

MK-677 increased stage IV sleep by 50% and REM sleep by 20% in clinical trials. Here's how growth hormone peptides affect sleep architecture.

14 min read|Mar 22, 2026