GHRP-6
Effect Profile
How GHRP-6 scores across 8 body systems
24
/ 80 total
Top strengths
Purrptide digest
GHRP-6 is the granddaddy of growth hormone releasing peptides — discovered decades before ghrelin itself was even identified as a hormone. The hunger it triggers isn't a side effect, it's the same mechanism doing double duty. Bodybuilders in the 90s figured this out long before the science fully caught up. It also raises cortisol and prolactin, which is why the field eventually moved toward more selective options like Ipamorelin. GHRP-6 stuck around anyway because it's cheap and it works.
What this means for you
Expect serious hunger within 15-30 minutes of dosing. Bulking phases love this peptide for exactly that reason.
Predates the discovery of ghrelin as an endogenous hormone — this peptide is actually how scientists found the receptor in the first place.
Historically significant: GHRP-6 research directly led to identifying the ghrelin receptor pathway that an entire peptide category now exploits.
Cheap, generic, and still widely used decades later. Not a growth market, but a stable legacy one.
For the nerds
Growth hormone (GH)-releasing peptide stimulates GH release from cultured pituitary cells
Endocrinology · DOI: 10.1210/endo-114-5-1537
Read full paper on PubMed →