Home›Research›Compare›Ghrelin vs GHRP-2
Peptide ComparisonGhrelin vs GHRP-2
Both are GH / IGF Axis peptides.
Ghrelin
acyl ghrelin
Half-life: ~24 min (initial), ~146 min (terminal)
3 providers listed
GHRP-2
Growth Hormone Releasing Peptide 2
Half-life: 15–60 minutes
42 providers listed
Ghrelin carries stronger published evidence (RCT, 5 key studies) than GHRP-2 (Cohort study, 2); both are research compounds.
Ghrelin
Half-life
~24 min (initial), ~146 min (terminal)
GHRP-2
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 42) | GHRP-2 |
Research summary only — not medical advice. Consult a qualified provider before making any decisions.
Ghrelin
GHRP-2
Ghrelin
A Secondary, Subgroup Analysis of Alcohol Cue-Exposure Craving in Response to Pharmacological Inhibition of t…
Pilot clinical trial of macimorelin to assess safety and efficacy in patients with cancer cachexia
Safety, tolerability, pharmacokinetics, and pharmacodynamics of macimorelin in healthy adults: Results of a s…
Constant intravenous ghrelin infusion in healthy young men: clinical pharmacokinetics and metabolic effects
+1 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-2
Synthetic hexapeptide that stimulates pulsatile growth hormone release from the anterior pituitary by acting on the ghrelin receptor (GHSR-1a). Commonly stacked with GHRH analogs such as CJC-1295 or Sermorelin to amplify GH output synergistically.
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-2
Under clinical review
Being verified by our medical team before we display contraindications for this peptide.
GHRP-2 stimulates GH and cortisol release. Research protocols measure IGF-1 for GH axis response and baseline cortisol given the compound's adrenal stimulation. Glucose markers are standard given GH's effect on insulin sensitivity.
GHRP-2
Corticosteroids
Research notes that GHRP-2 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-2
Where to source these peptides
Ghrelin
3 listed
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Providers offeringGHRP-2
42 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 August 26, 2026
Free to reference and republish with attribution to PeptideBase. Choose a format:
PeptideBase. (2026). Ghrelin vs GHRP-2 — Per-mg Price Comparison. Retrieved September 12, 2026, from https://peptidebase.io/peptides/compare/ghrelin/ghrp-2