GHRP-2
Growth Hormone Releasing Peptide 2 · Pralmorelin · KP-102
The 'Goldilocks' GH secretagogue — stronger than Ipamorelin, cleaner than GHRP-6. The balanced middle ground.
What is GHRP-2?
GHRP-2 sits in the sweet spot between Ipamorelin (gentle, minimal side effects, lower GH release) and GHRP-6/Hexarelin (powerful GH release but messy side effects). It produces substantial GH elevation with moderate appetite stimulation and modest cortisol/prolactin increases. For many biohackers and clinicians, it represents the best balance of efficacy and tolerability.
Developed in the 1990s and studied extensively (including under the name Pralmorelin in Japan, where it is used as a diagnostic agent for GH deficiency), GHRP-2 has a solid research foundation. It is one of the most thoroughly characterised GH secretagogues in terms of dose-response, pharmacokinetics, and side effect profile.
The practical difference from GHRP-6: you will get hungry, but not ravenously so. You will get a cortisol bump, but not enough to disrupt sleep. You will get meaningful GH release — maybe 80% of GHRP-6's potency without the problematic appetite and hormonal disruption. For most people optimising body composition and recovery, GHRP-2 is the rational choice in this class.
How Does It Work?
GHRP-2 binds GHS-R1a (ghrelin receptor) and triggers:
1. Pituitary GH release — robust (stronger than Ipamorelin, slightly less than Hexarelin). 2. Mild ghrelin-mimetic appetite stimulation — present but manageable. 3. Mild cortisol elevation — clinically insignificant at standard doses. 4. Mild prolactin elevation — less concerning than GHRP-6 or Hexarelin. 5. Hypothalamic GHRH stimulation — amplifies pituitary response.
Synergises strongly with GHRH analogues (combining GHRP-2 with CJC-1295 or Sermorelin produces GH release greater than the sum of either alone). This synergy is well-documented and exploited in clinical protocols.
What Does The Research Say?
Strong clinical evidence from human trials.
Diagnostic use: Approved in Japan (Pralmorelin) for diagnosing GH deficiency — demonstrating regulatory-level evidence of safety and efficacy for GH stimulation.
GH release: Dose-response well-characterised. 100mcg produces reliable 5-10x increase in GH. Synergy with GHRH confirmed in multiple studies.
Body composition: Limited dedicated trials, but GH physiology is well-understood. Practitioners report meaningful improvements in body composition, sleep, and recovery with chronic use.
Comparative: Head-to-head studies confirm intermediate potency between Ipamorelin and Hexarelin, with intermediate side effect profile. Desensitisation occurs but less than Hexarelin.
Reported Dosages
These are dosages reported in research literature and community reports. They are NOT medical recommendations. Always consult a healthcare professional.
Subcutaneous: 100-300mcg 2-3 times daily.
Most common protocol: 100-200mcg before bed (for sleep/recovery) or before bed + morning (for body composition).
Empty stomach essential (30 min before food).
Often combined with CJC-1295 no DAC (Mod GRF 1-29) for synergistic effect.
Cycle: 8-16 weeks on, 4 weeks off (desensitisation is slower than Hexarelin).
DISCLAIMER: Research peptide outside Japan. Approved as diagnostic in Japan only. Work with knowledgeable practitioner.
Side Effects & Risks
Moderate appetite increase (less than GHRP-6), mild water retention, occasional tingling/flushing, mild cortisol and prolactin elevation (rarely clinically significant at standard doses). Some users report vivid dreams (related to GH-enhanced deep sleep).
Good tolerability profile — most users find side effects manageable. The appetite effect can actually be beneficial for those trying to eat more for muscle gain.
Legal Status by Country
Research peptide. Not approved for clinical use.
Research chemical. Not FDA-approved. Available from peptide suppliers.
Research peptide in most countries. Studied in clinical settings.
Not TGA-approved. Research chemical.
Important Disclaimer
This profile is for educational and research purposes only. It does not constitute medical advice. GHRP-2 may be regulated or illegal in your jurisdiction. Do not use any compound without consulting a qualified healthcare professional. StackPedia does not sell, supply, or promote the use of any controlled substance.