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GHRP-2 description

Peptide GHRP-2 (Growth Hormone Releasing Peptide-2; Pralmorelin) is a synthetic analogue of met-enkephalin (naturally occurring, endogenous opioid peptide) and growth hormone secretagogue (GHS), that acts as growth hormone secretagogue receptor (GHSR) agonist and stimulates natural production of growth hormone (GH). GHRP-2 is a single, non-glycosylated polypeptide chain containing 6 amino acids, with the amino acid sequence D-Ala-D-(β-naphthyl)-Ala-Ala-Trp-D-Phe-Lys-NH2 and molecular mass 817.9749 g/mol. This GHR peptide has been extensively studied for its utility as a growth hormone secretagogue (GHS).

GHRP-2 chemical structure
GHRP-2 (Pralmorelin) chemical structure

GHRP-2 vs. GHRP-6, Differences

Like the GHRP-2 and GHRP-6 peptides themselves, their effects are also very similar. However, unlike GHRP-6, the GHRP-2 peptide does not tend to evoke as strong a feeling of increased hunger as GHRP-6 does. However, at higher doses, GHRP-2 may lead to a marked increase in cortisol and prolactin production.

GHRP-2 and clinical use

GHRP-2 was the first of this class of drugs to be introduced clinically. It is used as a diagnostic agent, which is sold in a single dose formulation for the assessment of growth hormone deficiency (GHD). In past, GHRP-2 was also under investigation for the treatment of GHD and short stature (pituitary dwarfism), and made it to phase II clinical trials for these indications. However, the ability of GHRP-2 to increase plasma GH levels in humans with GHD has been shown to be significantly lower compared to healthy individuals, therefore ultimately, GHRP-2 peptide as a GHD treatment has never been marketed.

Scientifically investigated possible benefits of GHRP-2 

    • Increased lean muscle mass, promoting muscle growth, strength and performance
    • Improved overall regeneration
    • Support fat burning
    • Anti-aging and rejuvenating effects
    • Improved vitality, freshness
    • Supports collagen production, healthier skin
    • Can help reduce the risk of cardiovascular disease
    • Strengthened immune system
    • Can help improve sleep

GHRP-2 possible side-effects

    • Carpal tunnel syndrome
    • Skin irritation at the injection site
    • Reduced insulin sensitivity
    • Dizziness rarely


What is GHRP-2?

Peptide GHRP-2 is a synthetic analogue of met-enkephalin and growth hormone secretagogue, that acts as growth hormone secretagogue receptor agonist and stimulates natural production of growth hormone (GH).

What does GHRP-2 do?

GHRP-2 significantly stimulates natural production of growth hormone (GH) in the body.

What is GHRP-2 used for?

In Japan, GHRP‐2 is clinically used as a diagnostic agent for growth hormone secretion deficiency (GHD).

Does GHRP-2 cause hunger?

GHRP-2 can cause hunger, but not as strong as GHRP-6.

What is the difference between GHRP-2 and GHRP-6 peptides?

Like both peptides, GHRP-2 and GHRP-6 are very similar, their effects are also similar. However, the GHRP-2 peptide does not tend to produce as strong a feeling of increased hunger as GHRP-6, but at higher doses may in turn lead to an increase in cortisol and prolactin production.

GHRP-2 dosage

In the scientific studies and clinical trials performed, the optimal dose of GHRP-2 is often reported as 1 mcg per 1 kg body weight 3 times daily.

Additional information


Growth Hormone Releasing Peptide-2, Pralmorelin, KP-102; KP 102; KP102, GHRP Kaken 100, pralmorelin hydrochloride, pralmorelin dihydrochloride

Catalogue number


Amino acid sequence


Molecular formula


Molecular weight

817.9749 g/mol

InChi Key


Amount of active substance

5 mg


> 98%


Sterile filtered white lyophilized freeze-dried powder


The protein/peptide was lyophilized with no additives



Stability and storage

Stable at room temperature for 3 weeks. Recommended long-term storage dried below -18 °C, upon reconstitution peptide should be stored at 4°C between 3-10 days.


Recommended to reconstitute the lyophilized peptide in 18MΩ-cm sterile water (not less than 100 µg/ml)


Sold for the scientific research use only


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