Growth Hormone · Endocrine · Anti-Aging
Sermorelin
Also known as: GHRH(1-29), Geref (withdrawn), Sermorelin acetate
A 29-amino-acid GHRH fragment formerly FDA-approved for pediatric growth hormone deficiency and now widely discussed in adult anti-aging contexts.
Sign in to add to watchlistEvidence strength
Strength of human clinical evidence — A (strongest) to D (mostly preclinical). This reflects research maturity, not safety or suitability.
Vial Theory provides educational research summaries only. Content is not medical advice, diagnosis, treatment, dosing guidance, or individualized suitability screening. Regulatory status can change over time and varies by jurisdiction.
Key Takeaways
- ›Sermorelin is a GHRH fragment that prompts the body's own pulsatile growth-hormone release.
- ›It was FDA-approved for pediatric growth hormone deficiency but the branded product was withdrawn (2008) for commercial reasons.
- ›Adult anti-aging, sleep, and recovery claims rest on small, limited studies.
- ›It is now a compounded product with variable quality; long-term safety in healthy adults is not established.
- ›Speak with a licensed healthcare professional before making any health-related decisions.
What It Is
Sermorelin is the 1-29 amino acid N-terminal fragment of human growth hormone-releasing hormone (GHRH), which retains the receptor-binding domain responsible for stimulating pituitary somatotrophs. It is shorter and less stabilized than tesamorelin, with a substantially shorter circulating half-life.
The compound was developed in the 1970s and 1980s following identification of the GHRH peptide and entered clinical use as Geref for pediatric growth hormone deficiency and as a diagnostic agent for assessing somatotroph function. Mechanistically, sermorelin acts at the GHRH receptor to trigger pulsatile endogenous growth hormone release, in contrast to exogenous growth hormone administration, which bypasses the regulatory feedback loop entirely.
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Disclaimer: This content is for educational and research purposes only and is not medical advice. Always consult a licensed healthcare professional before making health-related decisions.