At a glance
- Class
- Growth hormone releasing peptide (GHRP)
- Receptor targets
- GHS-R1a (ghrelin receptor)
- Length
- 6 amino acids (contains D-residues)
- Molecular mass
- ≈ 0.82 kDa
- Origin
- Synthetic
- Research area
- Growth-hormone axis
- Also known as
- Pralmorelin, KP-102
What GHRP-2 is
GHRP-2 (pralmorelin) belongs to the growth hormone releasing peptide family. It is a hexapeptide containing D-amino acids, which make it resistant to peptidases, and it acts on the ghrelin receptor rather than the GHRH receptor.
It is often discussed alongside GHRP-6, hexarelin and ipamorelin, which differ in how selective they are for growth hormone release compared with other pituitary hormones. Its one regulatory approval is as a single-dose diagnostic in Japan.
What the research literature studies
- Ghrelin-receptor binding and calcium signalling in pituitary and cell models
- Comparison of GHRP family members for selectivity of growth hormone release
- Resistance to peptidase degradation conferred by D-amino acid substitutions
Evidence rating: 3/5
Early human trials. Human pharmacology and diagnostic-use studies; no approved therapeutic use. See our methodology for how levels are assigned.
- The approved use is a one-off diagnostic test, so it says little about any other context.
- Compared with more selective members of the family, it also affects other pituitary hormones.
Regulatory status
GHRP-2 is approved in Japan as a diagnostic agent for assessing growth hormone secretion, and has no therapeutic approval from the MHRA, EMA or FDA. It is prohibited under anti-doping rules. Research-grade material must not be used in people or animals.
Reviewed November 2026.
GHRP-2 at Nordapep: sizes and price per mg
Every size, its price and the cost per milligram, so you can choose the best-value vial for your protocol.
Not currently listed at Nordapep.
Compare GHRP-2
GHRP-2 FAQ
How does GHRP-2 differ from GHRP-6?
Both activate the ghrelin receptor. They differ in sequence and in their effect profile; see the side-by-side comparison for structure and evidence level.
Is GHRP-2 approved?
Only in Japan, and only as a diagnostic agent. It is not approved as a treatment anywhere that we are aware of.
Where can I buy GHRP-2 for research?
Nordapep does not currently list GHRP-2. You can ask Nordapep about availability, or compare related compounds that are in stock.
Key terms for GHRP-2
Cite this page
peptide.wiki. (2026). GHRP-2: research peptide profile. peptide.wiki. https://www.peptide.wiki/peptides/ghrp-2