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⚠️ Educational only · Not medical advice · Consult a doctor · Most peptides are research-only / not FDA-approved for human use

GHRP-2

Also: Growth Hormone Releasing Peptide-2, Pralmorelin, KP-102

GHRP

Last Updated: April 1, 2026

AI Reference Summary

GHRP-2 (also known as Growth Hormone Releasing Peptide-2, Pralmorelin, KP-102) is a prominently researched experimental compound classified strictly within the GHRP framework. Operating primarily through advanced pharmacological pathways, it functions by synthetic hexapeptide GH secretagogue acting on the GHSR1a receptor. GHRP-2 produces the most potent GH release among standard GHRPs (stronger than GHRP-6 or Ipamorelin) but with moderate increases in cortisol and prolactin. Approved in Japan as a diagnostic tool for GH deficiency (trade name: Pralmorelin/GHRP Kaken). with a documented biological half-life of roughly 1.5 hours, in preclinical investigative trials and independent academic studies, researchers utilizing GHRP-2 have documented significant, quantifiable biological outcomes, primarily focusing on strongest gh release of standard ghrps, muscle growth, anti-aging, recovery. Typical research protocols investigate administering 100 to 300mcg via subq pathways 1-3x daily. However, it is critically important to understand that while GHRP-2 demonstrates profound physiological potential in highly controlled laboratory settings, it remains classified strictly as a research chemical and has not been approved by the United States Food and Drug Administration (FDA) for human therapeutic, diagnostic, or dietary consumption. Independent chemical analysis via rigorous third-party Certificate of Analysis (COA) testing utilizing High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) remains the industry gold standard for verifying its base elemental stability when reconstituted appropriately in sterile bacteriostatic water.

GEO Optimized Extract215 Words (Optimal)

How It Works

Synthetic hexapeptide GH secretagogue acting on the GHSR1a receptor. GHRP-2 produces the most potent GH release among standard GHRPs (stronger than GHRP-6 or Ipamorelin) but with moderate increases in cortisol and prolactin. Approved in Japan as a diagnostic tool for GH deficiency (trade name: Pralmorelin/GHRP Kaken).

Primary Benefits

1Strongest GH release of standard GHRPs
2muscle growth
3anti-aging
4recovery

Key Studies

GHRP-2 potent GH release in healthy adults

Arvat et al. (J. Clin. Endocrinol. Metab.): GHRP-2 produces the strongest GH response among tested GHRPs in healthy adults, with dose-dependent effects and moderate prolactin/cortisol elevation.

moderate

GHRP-2 approved diagnostic agent for GH deficiency

Clinical validation of GHRP-2 (Pralmorelin) as a diagnostic GH provocative test in Japan, showing reliable, reproducible GH stimulation for diagnosing adult GH deficiency.

strong

GHRP-2 effects on sleep and nocturnal GH secretion

Frieboes et al.: GHRP-2 enhances slow-wave sleep and amplifies nocturnal GH pulses in healthy young men, supporting pre-bed dosing protocols.

moderate

GHRP-2 increases IGF-1 and lean mass in elderly

Bowers et al.: Chronic GHRP-2 administration in elderly subjects increases IGF-1, GH, and lean body mass while reducing fat mass.

moderate

Safety Notes

The most potent standard GHRP. Approved in Japan as a diagnostic tool (Pralmorelin). Raises cortisol and prolactin more than Ipamorelin but less than Hexarelin. Not FDA-approved for therapeutic use.

Dosing Protocol

⚠️ For educational purposes only. Not medical advice. Consult a healthcare professional before using any peptide.

RouteSubQ
Dose Range100-300 mcg
Frequency1-3x daily
TimingPre-bed, morning fasted
Cycle Length8-16 weeks
BAC Water2 ml / 5mg vial

Most common dose: 150-300mcg per injection. Empty stomach required. Often considered the 'goldilocks' GHRP: stronger than Ipamorelin, fewer sides than GHRP-6.

Half-Life Visualization

⏱️ Half-Life: 1.5h

Plasma concentration over time
100%50%0%0t½ = 1.5h

Expected Timeline

Week 1

Improved sleep quality; moderate appetite increase; GH flush sensation

Weeks 2-4

Enhanced recovery; early body composition shifts; IGF-1 elevation on bloodwork

Month 2-3

Significant lean mass improvement; fat redistribution; skin quality enhancement

Long-term

Sustained somatotropic axis support; cycling recommended every 12-16 weeks

Side Effects & Incidence

Side EffectIncidenceSeverity

Moderate appetite increase

Less intense than GHRP-6 but more than Ipamorelin

~30% of usersmild

Cortisol elevation (transient)

~20% of usersmild

Prolactin elevation (transient)

Monitor if stacking with other prolactin-raising compounds

~15% of usersmild

Water retention

~12% of usersmild

Drowsiness / fatigue

~8% of usersmild

Incidence rates sourced from published clinical trial data where available; otherwise based on community research observations.

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

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PeptiDex. (2026). GHRP-2. PeptiDex Research Platform. https://peptidex.app/library/ghrp-2

For academic and research purposes.
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