GHRP

Ipamorelin vs GHRP-2: Complete Research Comparison (2026)

Side-by-side research comparison of Ipamorelin and GHRP-2: dosing, half-life, side effects, and mechanism of action.

Side-by-Side Analysis

DimensionIpamorelinGHRP-2
MechanismSelective GH secretagogue that mimics ghrelin at the GHS receptor.Synthetic hexapeptide GH secretagogue acting on the GHSR1a receptor.
Primary BenefitsGH release, muscle growth, recovery without cortisol spikeStrongest GH release of standard GHRPs, muscle growth, anti-aging, recovery
Typical Dose300–300mcg100–300mcg
Frequency7x/wk1-3x daily
Half-Life2 hours1.5 hours
FDA StatusApprovedApproved
Clinical Studies20+ key studies20+ key studies

Which one should you choose?

Ipamorelin is better for clean, side-effect-free anti-aging, while GHRP-2 is better for maximum GH release when hunger stimulation is acceptable. Both are Growth Hormone Releasing Peptides that mimic ghrelin. GHRP-2 is significantly more potent at stimulating GH but also causes a moderate increase in cortisol, prolactin, and appetite. Ipamorelin is unique among GHRPs because it does not increase cortisol or prolactin at any dose. Choose Ipamorelin for long-term use, sleep improvement, and gentle anti-aging. Choose GHRP-2 if you need aggressive recovery, appetite stimulation for bulking, or a stronger IGF-1 response. For the average researcher, Ipamorelin is the highly recommended default due to its pristine safety profile.

Where to Source Ipamorelin for Research

Finding verified, high-purity Ipamorelin requires rigorous COA verification. We independently evaluate vendors based on third-party HPLC testing, purity thresholds (≥98%), and batch-specific documentation.

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Disclosure: PeptiDex may earn a commission from purchases made through affiliate links. This does not affect our editorial independence or recommendations. We exclusively feature vendors that pass our strict quality verification protocols.

Where to Source GHRP-2 for Research

Finding verified, high-purity GHRP-2 requires rigorous COA verification. We independently evaluate vendors based on third-party HPLC testing, purity thresholds (≥98%), and batch-specific documentation.

View COA-Verified GHRP-2

✓ Third-party tested✓ US shipping✓ COA on every batch

Disclosure: PeptiDex may earn a commission from purchases made through affiliate links. This does not affect our editorial independence or recommendations. We exclusively feature vendors that pass our strict quality verification protocols.

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This comparison is for educational purposes only. Many peptides are not FDA-approved for human therapeutic use. Consult a healthcare provider before using any peptide. Read full disclaimer.