Sermorelin
Also known as: GHRH (1-29), GRF 1-29
A GHRH analogue with a real medical past — but the anti-ageing and physique claims made for it today outrun the evidence.
Regulatory status: Historically used in medicine as a growth-hormone-releasing agent — including as a test of pituitary function and in assessing growth in children — though the branded product was later discontinued in the US.
What it is
Sermorelin is a shortened synthetic version of natural growth-hormone-releasing hormone (GHRH). Unlike most compounds in this section, it has a genuine medical history — which the modern "anti-ageing clinic" marketing leans on heavily.
Composition
It corresponds to the active fragment of GHRH. It has been produced as a pharmaceutical agent, though the branded product was later discontinued in the US.
Proposed mechanism
As a GHRH analogue, it stimulates the pituitary to release the body's own growth hormone, rather than supplying growth hormone directly.
Claimed benefits
Reversed ageing, more muscle, better sleep and recovery — the standard growth-hormone-axis promises.
What the evidence shows
Preliminary· human data. It can stimulate the body's own growth-hormone release, which is well documented, and it was historically used as a test of pituitary function and in assessing growth in children. But the leap from that to reversing ageing or building muscle in healthy adults is not supported by good long-term human trials — which is where the modern marketing overreaches.
Legal & regulatory status
It has a real medical past but the branded product was discontinued; today's anti-ageing use sits outside that context. As a GHRH analogue it is on the WADA Prohibited List and banned in sport at all times.
Known risks & unknowns
Used medically it was given under supervision; self-directed use for anti-ageing or physique goals lacks that oversight and the same evidence base. Research-chemical versions also carry purity and contamination risks.
Sources
Frequently asked questions
- What is sermorelin?
- It is a shortened synthetic version of natural growth-hormone-releasing hormone (GHRH). Unlike most compounds in this section, it has a genuine medical history, having been used as a diagnostic agent and, at one time, in paediatric growth contexts before the branded product was discontinued.
- Does sermorelin work for anti-ageing or muscle?
- It can stimulate the body's own growth-hormone release, which is well documented. But the leap from that to reversing ageing or building muscle in healthy adults is not supported by good long-term human trials, which is where the modern 'anti-ageing clinic' marketing overreaches.
- Is sermorelin safe?
- It has been used medically under supervision, but self-directed use for anti-ageing or physique goals is a different context, without that oversight or the same evidence base. Products from research-chemical suppliers also carry purity and contamination risks.
- Is sermorelin banned in sport?
- Yes. As a GHRH analogue it falls under the WADA Prohibited List's peptide-hormone and growth-factor category and is banned at all times.
Related compounds
- CJC-1295 — Marketing claim
An evidence-tiered explainer on CJC-1295: a long-acting growth-hormone-releasing hormone analogue marketed for muscle and anti-ageing, with only early pharmacology data and no proven fitness benefits.
- Tesamorelin — Well-supported
An evidence-tiered, non-promotional explainer on tesamorelin (Egrifta): a GHRH analogue, the one GH-releasing peptide with FDA approval and robust trial data — for a specific medical use, not fitness.
- Ipamorelin — Marketing claim
An evidence-tiered explainer on ipamorelin: a synthetic growth-hormone secretagogue marketed for muscle, fat loss and anti-ageing, whose real-world fitness benefits in healthy people are unproven.
Written and reviewed by Mathew Beale — MSc Biotechnology, University of Reading.
Last reviewed: