GHRP-6 — EU research guide.
GHRP-6 is a synthetic hexapeptide ghrelin mimetic and one of the first GH secretagogues developed. It stimulates GH release via GHS-R1a and is notable for its pronounced appetite-stimulating effects through ghrelin pathway activation.
What is GHRP-6?
GHRP-6 was among the first synthetic GH secretagogues characterised. It binds GHS-R1a in the hypothalamus and pituitary to stimulate GH release and also acts centrally via the orexigenic ghrelin pathway to powerfully stimulate appetite. This distinguishes it from Ipamorelin (appetite-neutral) and GHRP-2 (moderate appetite effect). The hexapeptide structure includes two D-amino acids for protease resistance.
What does the research show?
Extensive GH pharmacokinetics data in healthy subjects shows reliable GH pulses 15–60 minutes post-injection. In catabolic states, GHRP-6 shows protective effects on cardiac muscle and modulates inflammatory cytokines via a mechanism partially independent of GH release. The BPC-157 interaction with GHRP-6 in gut healing models has generated additional research interest.
EU legal status
Not approved in the EU. WADA-prohibited in sport (S2). Available for laboratory research only.
Molecular information
Pharmacokinetics
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Frequently asked questions
What is GHRP-6? ▾
GHRP-6 was among the first synthetic GH secretagogues characterised. It binds GHS-R1a in the hypothalamus and pituitary to stimulate GH release and acts via the orexigenic ghrelin pathway to powerfully stimulate appetite.
Why does GHRP-6 increase appetite so strongly? ▾
It acts centrally via the ghrelin pathway, which powerfully stimulates appetite, distinguishing it from appetite-neutral ipamorelin and the moderate effect of GHRP-2.
What does the research show? ▾
Extensive GH pharmacokinetic data show reliable GH pulses 15 to 60 minutes post-injection, and in catabolic states it shows protective effects on cardiac muscle and modulates inflammatory cytokines partly independently of GH release.
What is the connection between GHRP-6 and BPC-157? ▾
The interaction between GHRP-6 and BPC-157 in gut-healing models has generated additional research interest.
Is GHRP-6 legal in the EU? ▾
It is not approved in the EU and is sold as a research compound for laboratory use only.
Is GHRP-6 banned in sport? ▾
Yes. It appears on the WADA prohibited list (S2).