What is Sermorelin?
Sermorelin: GHRH(1-29) fragment, the shortest fully active portion of growth hormone-releasing hormone, that stimulates pulsatile pituitary GH release. The sources cited here most often discuss it for: Natural-rhythm GH and IGF-1; Lean mass gain, small study; Deeper sleep, anecdotal. Evidence label: Early human.
- Type
- Peptide
- Family
- Growth Hormone Axis
- Evidence label
- Early human (3 of 5)
- Regulatory status
- Formerly FDA-approved as Geref for growth hormone deficiency in children and for diagnostic testing; the maker discontinued it in 2008, approval was withdrawn in 2009, and FDA later determined this was not for safety or effectiveness reasons.
- Goals discussed
- Hormones & Fertility, Muscle & Tone, Sleep
- Also called
- Geref, Gerel, sermorelin acetate, GRF 1-29, GHRH (1-29)
- Last reviewed
- 2026-10-11
- GHRH(1-29) fragment, the shortest fully active portion of growth hormone-releasing hormone, that stimulates pulsatile pituitary GH release; formerly FDA-approved as Geref (pediatric GHD, diagnostic), discontinued 2008 and approval withdrawn 2009 (not for safety reasons); now only via compounding pharmacies.12
Regulatory status Formerly FDA-approved as Geref for growth hormone deficiency in children and for diagnostic testing; the maker discontinued it in 2008, approval was withdrawn in 2009, and FDA later determined this was not for safety or effectiveness reasons. 1
These observations suggest that GHRH analog administration induced anabolic effects favoring men more than women.
Single-blind placebo-controlled trial of a GHRH(1-29) analog in 19 adults aged 55 to 71 (J Clin Endocrinol Metab, 1997).
What is Sermorelin researched for?
The three outcomes most discussed for Sermorelin in the sources below, as those sources report them. humanpeptides.fyi makes no claims of its own: a listed benefit can be unproven or can have failed in trials, and the label on each line says which.
Natural-rhythm GH and IGF-1
What do researchers and users say about Sermorelin?
Sermorelin is mostly hype dressed in real biology
A sleep doctor's view of sermorelin used for deep sleep, given the lack of modern clinical trials.
After a week, I noticed my sleep quality drastically increased. I now have vivid dreams almost every night when I never used to dream at all.
Unverified self-report from a prescribed user; other commenters in the thread reported little beyond deeper sleep.
What side effects of Sermorelin are reported?
- Injection-site reactions, flushing, nausea, dizziness, headache, sleep disruption; compounded product quality concernsmedia/clinical blog811
- Physicians caution that because growth-hormone-releasing peptides stimulate growth, they could make existing tumors grow faster.clinician opinion (media)8
- Night sweats and hot flashes in bed in the first weeks were reported by one user, who also saw estradiol rise on bloodwork.anecdotal10
- Aching knees were reported by one user while on sermorelin.anecdotal10
What do peptide guides say about Sermorelin?
- Dr. Axe Dr. Axe lists sermorelin as a compounded prescription product with a historical FDA approval, and notes it is on the World Anti-Doping Agency prohibited list for tested athletes. 12
- PepEdHub PepEdHub describes sermorelin as a copy of the first 29 amino acids of natural GHRH that works through the normal feedback loop, so growth hormone release stays pulsatile rather than constant. 13
- Seek Peptides Seek Peptides presents sermorelin as an older, established growth-hormone-releasing peptide used for GH optimization, recovery and sleep, and says it is less selective than ipamorelin. 14
- PubMed In a 5-month placebo-controlled study of older adults, a sermorelin-type analog raised skin thickness in both sexes but lean mass, insulin sensitivity, well-being and libido only in men; sleep quality did not change. 9
- GQ GQ reports the only sleep data are old and small, with no current clinical trials of sermorelin for sleep, and sleep doctors favor exercise as a proven way to deepen sleep. 8
What does the research say, system by system?
How strong is the evidence for Sermorelin?
Formerly FDA-approved (pediatric); small/older human studies in adults; adult anti-aging use mostly anecdotal
Small, short, old, unblinded or single-group human studies. How tiers work
Questions about Sermorelin
What is Sermorelin?
GHRH(1-29) fragment, the shortest fully active portion of growth hormone-releasing hormone, that stimulates pulsatile pituitary GH release.
Is Sermorelin FDA-approved?
Formerly FDA-approved as Geref for growth hormone deficiency in children and for diagnostic testing; the maker discontinued it in 2008, approval was withdrawn in 2009, and FDA later determined this was not for safety or effectiveness reasons.
What is Sermorelin researched for?
The sources cited on this page most often discuss three outcomes: Natural-rhythm GH and IGF-1; Lean mass gain, small study; Deeper sleep, anecdotal. Each line above shows what the source reports and how strong that evidence is.
What side effects of Sermorelin are reported?
Reported in the cited sources: Injection-site reactions, flushing, nausea, dizziness, headache, sleep disruption; compounded product quality concerns; Physicians caution that because growth-hormone-releasing peptides stimulate growth, they could make existing tumors grow faster; Night sweats and hot flashes in bed in the first weeks were reported by one user, who also saw estradiol rise on bloodwork. The list is not complete, and few listed risks does not mean a compound is safe.
How strong is the evidence for Sermorelin?
Evidence label: Early human. Formerly FDA-approved (pediatric); small/older human studies in adults; adult anti-aging use mostly anecdotal.
What else is Sermorelin called?
Names used for it include Geref, Gerel, sermorelin acetate, GRF 1-29, GHRH (1-29).
Does humanpeptides.fyi recommend Sermorelin?
No. humanpeptides.fyi makes no claims and no recommendations of its own. It summarizes and links to what others have published and posted. Nothing here is medical advice; talk to a licensed clinician.