ResearchSafe

Sermorelin (Sermorelin Acetate (GHRH 1-29))

Category: Growth Hormone. Status: Previously FDA-approved (discontinued 2008).

The biologically active fragment of GHRH (first 29 amino acids). Previously FDA-approved for GH deficiency in children. Stimulates natural pulsatile GH release. Now available through compounding pharmacies.

How it works

Binds GHRH receptors on anterior pituitary via cAMP-PKA pathway. Preserves natural feedback regulation and pulsatility unlike exogenous HGH.

Key facts

  • Molecular weight: 3,358 Da
  • Half-life: 10-20 minutes
  • Bioavailability: Moderate (SubQ)
  • Storage: Lyophilized: 2-8°C. Reconstituted: 2-8°C for 14 days.

Dosing overview

  • Typical dose: 200-300 mcg
  • Frequency: Once daily before bed
  • Duration: 3-6 months
  • Route: Subcutaneous injection

Protocol notes

  • Single nightly dose of 200-300 mcg, injected fasted before sleep.
  • Run for 3-6 months since it works by gently restoring natural GH rhythm rather than spiking it.

Reported benefits

  • Natural GH pulsatility preserved
  • Improved sleep quality
  • Body composition improvement
  • Skin elasticity
  • Long safety record

Possible side effects

  • Injection site reaction
  • Flushing
  • Headache
  • Dizziness

Research

  • Long-term sermorelin therapy for adult GH deficiency (2018): Six months increased IGF-1 by 30%, improved body composition and sleep quality without suppressing endogenous GH axis.
  • Sermorelin vs somatotropin for GH replacement (2020): Achieved 70% of HGH effects on IGF-1 with superior safety profile and preserved pituitary function.

Community reviews of Sermorelin

Rated 4.3 out of 5 from 8 community reviews by ResearchSafe members.

  • cycle_sage rated it 4/5 - Better recovery and deeper sleep at 6 months: Sermorelin has been a solid addition to my protocol. The GH release translates to better sleep, improved recovery, and a gradual improvement in body composition that I did not get from training alone. I track my sleep with a wearable and my deep sleep percentage went from 12% to about 18-20% within the first two weeks. That alone is worth it for recovery. The body comp changes are more subtle but visible in progress photos over 2-3 months. No significant side effects at the doses I am running. Occasionally wake up with slightly puffy hands but it resolves within an hour. Recommend starting c
  • lab_notes_tom rated it 5/5 - Body comp changes subtle but real: About 2 months into my Sermorelin protocol and the compound is doing what it is supposed to. Sleep is deeper, skin quality is better, fat around the midsection is slowly reducing, and my recovery from training is improved. The key insight I have learned is patience. This is not an overnight transformation. It is a slow, steady optimization that compounds over weeks and months. People who quit after 2 weeks are not giving it enough time. Only downsides: some mild joint stiffness early on (actually a sign it is working) and the fasted dosing schedule is sometimes inconvenient. Worth it for the
  • data_driven_dan rated it 4/5 - Clean GH pulse without the sides: Running Sermorelin for 2 months now, primarily for recovery and body composition. The first benefit I noticed was dramatically better sleep, deeper and more restorative, within the first week. Body composition changes came slower but are real. Leaner midsection, slightly fuller muscles, and my recovery between training sessions is noticeably improved. Not dramatic bodybuilder gains, more like everything works a bit better. Side effects have been minimal. Some water retention in the first 2 weeks that settled down, and occasional numbness in my fingers in the morning that goes away within an
  • subq_samantha rated it 4/5 - Sleep quality improvement was the first thing I noticed: Running Sermorelin for 4 months now, primarily for recovery and body composition. The first benefit I noticed was dramatically better sleep, deeper and more restorative, within the first week. Body composition changes came slower but are real. Leaner midsection, slightly fuller muscles, and my recovery between training sessions is noticeably improved. Not dramatic bodybuilder gains, more like everything works a bit better. Side effects have been minimal. Some water retention in the first 2 weeks that settled down, and occasional numbness in my fingers in the morning that goes away within an
  • research_marcus rated it 4/5 - Gradual but consistent results: About 6 months into my Sermorelin protocol and the compound is doing what it is supposed to. Sleep is deeper, skin quality is better, fat around the midsection is slowly reducing, and my recovery from training is improved. The key insight I have learned is patience. This is not an overnight transformation. It is a slow, steady optimization that compounds over weeks and months. People who quit after 2 weeks are not giving it enough time. Only downsides: some mild joint stiffness early on (actually a sign it is working) and the fasted dosing schedule is sometimes inconvenient. Worth it for the
  • frugal_protocol rated it 4/5 - quiet sleep support, but less convincing than cjc-1295: i ran sermorelin for about 4 months here in germany, mainly because at 45 i wanted a gentler recovery aid while still teaching yoga and training on the side. for me it seemed to make sleep a bit more settled and mornings less flat, and maybe my skin looked slightly better? i actually preferred cjc-1295 for the same goal, since that felt more noticeable overall. sermorelin was decent, just a little subtle.

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Community discussions about Sermorelin

Research and educational reference only. Not medical advice.