Home›Research›Compare›Ghrelin vs GHRP-6
Peptide ComparisonGhrelin vs GHRP-6
Both are GH / IGF Axis peptides.
Ghrelin
acyl ghrelin
Half-life: ~24 min (initial), ~146 min (terminal)
3 providers listed
GHRP-6
Growth Hormone Releasing Peptide-6
Half-life: 15-60 minutes
38 providers listed
Ghrelin carries stronger published evidence (RCT, 9 key studies) than GHRP-6 (RCT, 2); both are research compounds.
Ghrelin
Evidence
Half-life
~24 min (initial), ~146 min (terminal)
GHRP-6
Evidence
Half-life
15-60 minutes
| Your goal | Better option |
|---|---|
| Stronger clinical evidence | Ghrelin |
| Less frequent dosing (longer half-life) | Ghrelin |
| More provider options (3 vs 38) | GHRP-6 |
Research summary only — not medical advice. Consult a qualified provider before making any decisions.
Ghrelin
GHRP-6
Ghrelin
Associations of PYY, GLP-1 and LEAP2 with changes in feeding-related cognition, body weight and glucose homeo…
A Secondary, Subgroup Analysis of Alcohol Cue-Exposure Craving in Response to Pharmacological Inhibition of t…
Constant intravenous ghrelin infusion in healthy young men: clinical pharmacokinetics and metabolic effects
Metabolomic and proteomic analysis of ghrelin administration in mice infected with Echinococcus granulosus.
+5 more
About Ghrelin
Must be acylated at Ser3 (by GOAT enzyme) for GHSR-1a binding. Receptor activation in the pituitary stimulates GH release; hypothalamic action via NPY/AgRP neurons increases appetite and reduces energy expenditure.
About GHRP-6
Ghrelin receptor agonist; stimulates pituitary GH release and increases appetite via hypothalamic ghrelin pathways
Information below reflects published research data only — not medical advice. Consult a qualified provider before use.
Ghrelin
Under clinical review
Being verified by our medical team before we display contraindications for this peptide.
GHRP-6
Under clinical review
Being verified by our medical team before we display contraindications for this peptide.
GHRP-6 produces stronger cortisol and prolactin stimulation than selective GH peptides. Research protocols measure IGF-1 for GH axis response and baseline cortisol. Glucose markers are standard given GH's effect on insulin sensitivity.
GHRP-6
Corticosteroids
Research notes that GHRP-6 stimulates cortisol and ACTH release via the HPA axis. Combined use with corticosteroid medications may affect glucocorticoid regulation. Consult your prescriber before combining.
Ghrelin
Not enough vendor pricing yet.
GHRP-6
Where to source these peptides
Ghrelin
3 listed
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Providers offeringGHRP-6
38 listed
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PeptideBase lists providers for educational research purposes only. Always consult a qualified healthcare professional before obtaining or using any peptide.
More GH / IGF Axis Comparisons
Browse all peptides →Educational research tools — not medical advice.
Cite this page
Data last updated July 27, 2026
Free to reference and republish with attribution to PeptideBase. Choose a format:
PeptideBase. (2026). Ghrelin vs GHRP-6 — Per-mg Price Comparison. Retrieved July 29, 2026, from https://peptidebase.io/peptides/compare/ghrelin/ghrp-6