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GHRP-2: HGH / Somatropin research guide
In short: GHRP-2 (Pralmorelin), potent hexapeptide GHS-R1a agonist and first clinically approved growth hormone secretagogue for GHD diagnostic applications. It is studied in preclinical (cell and animal) research and is supplied strictly for laboratory use, not for human or clinical use.
Not medical advice. GHRP-2 is a research compound. This guide does not provide dosing, diagnosis, therapy recommendations, or claims about effects in humans.
GHRP-2 at a glance
What to know first
Details and limits sit in the sections below. Research use only.
What GHRP-2 is
GHRP-2 (pralmorelin) is a high-affinity ghrelin receptor agonist and the first growth hormone secretagogue to reach clinical approval as a diagnostic agent for growth hormone deficiency in Japan.
One-paragraph overview from our research datasheet. Still scientific, but faster to read than the full mechanism list below.
GHRP-2 (Pralmorelin), potent hexapeptide GHS-R1a agonist and first clinically approved growth hormone secretagogue for GHD diagnostic applications.
Research contexts
Peer-reviewed papers discuss GHRP-2 in specific lab settings. The points below reflect research questions, not health claims.
Research vs. personal use: Literature describes experiments in cells and animals. That is distinct from real-world use. Our products are for laboratory research only.
Typical study contexts
Why HGH / Somatropin research matters
Growth-hormone axis peptides are studied for GH/IGF signalling in animals and cells. Focus stays on endocrine biology, not prescribing.
Mechanisms (technical review)
Our datasheet lists mechanistic themes from preclinical work. These are research endpoints, not health claims.
Lab handling & preparation
Common Questions People Are Asking
What is GHRP-2?
GHRP-2 (pralmorelin) is a synthetic six-amino-acid growth hormone secretagogue that binds the ghrelin receptor (GHS-R1a) on the pituitary to trigger a sharp pulse of the body's own growth hormone. It is the first GH secretagogue to gain any regulatory approval, used as a GH-deficiency diagnostic in Japan. Supplied here as a lyophilised research-grade powder for laboratory use only.
What is the difference between GHRP-2 and GHRP-6?
Both are hexapeptide ghrelin-receptor agonists, but GHRP-2 releases more growth hormone per dose while producing a milder appetite (orexigenic) effect. GHRP-6 is the original of the family and the strongest hunger stimulant. Researchers reach for GHRP-2 when they want GH output without the pronounced appetite signal of GHRP-6.
How does GHRP-2 compare with ipamorelin?
GHRP-2 is a stronger GH releaser per dose, but it also produces modest cortisol, ACTH, and prolactin elevation that ipamorelin does not. Ipamorelin is cleaner and more selective; GHRP-2 is more potent and has a richer clinical pharmacokinetic dataset. The choice depends on whether the research protocol prioritises selectivity or potency.
What is the half-life of GHRP-2?
GHRP-2 is short-acting, with a functional half-life on the order of 15-30 minutes. The growth-hormone pulse it triggers typically peaks around 15 minutes after subcutaneous administration and returns toward baseline within roughly an hour, which is why research protocols describe multiple separated doses rather than a single sustained one.
Does GHRP-2 increase appetite?
Moderately. GHRP-2 activates hypothalamic ghrelin receptors enough to produce a noticeable increase in hunger in research subjects, but less dramatically than GHRP-6, which is the strongest orexigenic member of the family. The appetite effect is a direct consequence of acting on the same receptor as natural ghrelin.
Why is GHRP-2 stacked with CJC-1295?
GHRP-2 and CJC-1295 (a GHRH analogue) act on two different receptors - the ghrelin receptor and the GHRH receptor - that converge on growth-hormone release. Combining them in research models produces a larger, cleaner GH pulse than either peptide alone, which is the standard rationale for pairing a GHRP with a GHRH analogue.
Can GHRP-2 be dosed orally?
Oral bioactivity has been demonstrated across multiple species, though absolute oral bioavailability is quite low (roughly 0.3%). That means meaningful oral exposure requires much larger amounts than subcutaneous or IV, but the route does function in research protocols, and intranasal delivery has also been validated.
How should GHRP-2 be stored?
Keep the lyophilised powder frozen at −20 °C. After reconstitution with bacteriostatic water, refrigerate at 1-6 °C and protect from light. GHRP-2 is reasonably stable in solution within the standard peptide-handling window.
Is this page medical advice? Can I use GHRP-2 for my health?
No, and no. This article is educational only. We do not provide dosing, medical recommendations, or health claims. Our products are sold strictly for laboratory research, not for personal use of any kind.
Where do I find GHRP-2 specs, purity certificates and pricing?
Open the shop listing via “View product details.” There you will see batch specs, the Certificate of Analysis (COA), concentration, purity grade, and available SKUs with current pricing.
Related peptide guides
Other compounds researchers often read about alongside GHRP-2.
Scientific sources & further reading
Primary literature and registries for GHRP-2, plus mainstream coverage of the peptide category. Research use only - not medical advice.
Databases & literature:
Peptides in the news:
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Also known as: Pralmorelin, KP-102, GPA-748, Growth Hormone Releasing Peptide-2, GHRP Kaken 100, Pralmorelin Hydrochloride, Pralmorelin Dihydrochloride
PRECISION. PURITY. PERFORMANCE.
Research peptides at >99% HPLC-verified purity, third-party tested by Janoshik Analytical & Freedom Diagnostics, with Certificates of Analysis published per released batch. Supplied strictly for laboratory research use.
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