Ipamorelin
Also known as: Ipamorelin acetate
By GLPeptideSciences Editorial Team · How we evaluate evidence · Reviewed by Dr. George S. Watson, MD, Cardiothoracic Surgeon · Updated 2026-06-02
A selective ghrelin-receptor agonist studied as a growth hormone secretagogue — it prompts the pituitary to release the body's own growth hormone.
What it is & how it works
What it is
Ipamorelin is a growth hormone secretagogue — specifically a selective agonist of the ghrelin receptor (GHS-R). Rather than supplying growth hormone, it nudges the pituitary to release more of the body’s own.
How it is thought to work
By activating the ghrelin receptor, ipamorelin triggers a pulse of growth hormone release. In research it was noted for being relatively selective — producing GH release with comparatively little effect on cortisol and prolactin versus some older secretagogues.
The evidence gap
The release mechanism is well understood, but robust human outcome data in healthy adults is limited. Most reported benefits in fitness contexts are anecdotal, and the compound is not an approved therapy.
What it's discussed & studied for
- Growth hormone / IGF-1 support
- Recovery and sleep quality (anecdotal)
- Body composition (anecdotal)
Discussion of a use is not a claim that it works or is approved.
Research status
Early-phase and preclinical research as a GH secretagogue; not an approved therapy. Often discussed alongside CJC-1295.
Evidence quality
Limited human data. Mechanism (GH release) is well-characterized in principle; clinical outcomes in healthy users are largely anecdotal.
Dosing discussion
Community discussion references microgram subcutaneous dosing, frequently paired with a GHRH analog. This is convention, not clinically validated guidance.
Educational summary of what is discussed in the literature and community — not a dosing recommendation or medical advice.
Safety & harm reduction
Considered relatively selective (less effect on cortisol/prolactin than older secretagogues in studies), but human safety at community doses is not established. Not FDA-approved.
Sourcing literacy
Purity and accurate peptide content matter; underdosed or impure product is common on the gray market. Look for third-party assays.
Selected literature
FAQ
Does ipamorelin add growth hormone to the body?
No — it signals the pituitary to release more of your own growth hormone, rather than supplying hormone directly.
Why is it often paired with CJC-1295?
They act on different but complementary pathways (ghrelin receptor vs GHRH). The community pairs them; this is convention, not validated protocol.