Reviewed Mar 2026 | Sources: PubMed

GHRP-2 vs GHRP-6: Head-to-Head Comparison

GHRP-2 and GHRP-6 are closely related ghrelin mimetics. GHRP-2 is more potent for GH release and causes less hunger, while GHRP-6 is known for its intense appetite stimulation. Both raise cortisol and prolactin, but GHRP-6 does so to a lesser degree than GHRP-2.

Side-by-Side Comparison

DimensionGHRP-2GHRP-6
Evidence LevelExtensive clinical researchExtensive clinical research
FDA StatusNot approvedNot approved
GH Release PotencyHigher GH output per doseModerate GH output
Appetite StimulationModerate hunger increaseVery strong hunger increase
Cortisol/Prolactin ImpactModerate increase in bothMild to moderate increase
MechanismNon-selective GHS-R1a agonistNon-selective GHS-R1a agonist, stronger ghrelin mimetic
CostLow to moderateLow
Evidence Level
GHRP-2
Extensive clinical research
GHRP-6
Extensive clinical research
FDA Status
GHRP-2
Not approved
GHRP-6
Not approved
GH Release Potency
GHRP-2
Higher GH output per dose
GHRP-6
Moderate GH output
Appetite Stimulation
GHRP-2
Moderate hunger increase
GHRP-6
Very strong hunger increase
Cortisol/Prolactin Impact
GHRP-2
Moderate increase in both
GHRP-6
Mild to moderate increase
Mechanism
GHRP-2
Non-selective GHS-R1a agonist
GHRP-6
Non-selective GHS-R1a agonist, stronger ghrelin mimetic
Cost
GHRP-2
Low to moderate
GHRP-6
Low

Peptide Overviews

GHRP-2

BHuman Studies

GHRP-2 is a synthetic hexapeptide growth hormone secretagogue. It is one of the most potent GHRPs and has been used in clinical research for GH deficiency diagnosis.

Growth Hormone SecretagoguesNot Approved
View full GHRP-2 profile →

GHRP-6

BHuman Studies

GHRP-6 was one of the first synthetic GH secretagogues developed. It stimulates strong GH release but also significantly increases appetite through ghrelin receptor activation.

Growth Hormone SecretagoguesNot Approved
View full GHRP-6 profile →

GHRP-2 vs GHRP-6: FAQ

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Medical Disclaimer

This content is for informational and educational purposes only and does not constitute medical advice, diagnosis, or treatment recommendations.

Always consult a qualified healthcare provider before starting, stopping, or modifying any treatment. Do not disregard professional medical advice based on information found on this site.

No claims of therapeutic efficacy are made for substances that are not FDA-approved for the discussed indications. Research citations reflect published findings and do not imply endorsement.