GHRP-6 Acetate
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About GHRP-6 Acetate
GHRP-6 is a synthetic hexapeptide GHS-R1a agonist and one of the original growth hormone secretagogues. Two things distinguish it from the rest of the GHRP family: it produces robust GH release, and it produces the strongest appetite stimulation of the group. Those two effects come from the same receptor — GHS-R1a — but expressed in different tissues. Pituitary GHS-R activation drives GH release. Hypothalamic GHS-R activation, particularly on NPY/AgRP neurons, drives hunger. CAS: 87616-84-0. MW 873.0 Da.
The Appetite Angle
GHRP-6 is worth having independently of its GH effects. If the research question is ghrelin signaling in GLP-1 receptor-mediated signalling, gut-brain axis communication, or orexigenic peptide pharmacology, GHRP-6 is a more tractable tool than working with native ghrelin, which has a very short half-life and complex production sites. GHRP-6 activates GHS-R in the hypothalamus and gut with predictable kinetics.
The comparison that matters: GHRP-2 produces more GH per unit dose than GHRP-6. GHRP-6 produces more appetite stimulation. Ipamorelin is selective for GH release with minimal appetite or cortisol effects. Each occupies a specific niche based on which GHS-R-mediated pathways are under study. For pure GH research with clean experimental design, ipamorelin wins. For appetite and feeding behavior research, GHRP-6 is the appropriate tool.
Specifications
| Molecular Weight | 873.0 Da |
|---|---|
| CAS | 87616-84-0 |
| Purity | ≥98% (supplier batch spec; 99.4% avg across independently tested lots) |
| Form | Lyophilized powder |
| Sizes | 5mg, 10mg |
Storage: Lyophilized: −20°C, away from light. Once reconstituted: 2–8°C, use within 4 weeks.
Quality: Every product ships to a ≥98% supplier batch specification; selected lots are independently tested by Janoshik Analytical (HPLC + mass spectrometry; 99.4% average purity across published reports), searchable by batch code at certapeptides.com/verify. EU-based QC under CERTALAB S.R.L.
Frequently Asked Questions
Why does GHRP-6 cause more hunger than other GHRPs?
GHRP-6 activates GHS-R1a in both pituitary (driving GH release) and hypothalamus (driving appetite via NPY/AgRP neurons). The hypothalamic effect is notably stronger with GHRP-6 than with GHRP-2 or ipamorelin, for reasons that aren’t fully characterized but likely involve differences in receptor binding kinetics or tissue distribution of GHS-R subtypes. The appetite effect is the same receptor pathway as ghrelin’s orexigenic signal — ghrelin is sometimes called the “hunger hormone” for exactly this reason.
When is GHRP-6 preferred over GHRP-2?
When appetite stimulation or gut-brain GHS-R signaling is part of the experimental question. GHRP-2 is the better choice when maximizing GH pulse amplitude is the primary goal. GHRP-6 is better for research on orexigenic peptide pathways, appetite circuit pharmacology, or gut GHS-R biology, where the appetite effect is a feature rather than a confound.
For research purposes only. Not for human consumption.
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