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Hormones & Endocrine SignalingGrowth hormone secretagogue

GHRP-2

GHRP-2 is studied as a growth hormone secretagogue; synthetic hexapeptide containing d-amino acids and 2-naphthylalanine in biochemical and physiological models.

Category 2Preclinical Models Only (Animal / Lab)Also known as: Pralmorelin, KP-102, Growth hormone releasing peptide-2Skip to Human Evidence ↓
Other Research Areas

GHRP-2 Biological Classification

Research Record

Investigated within physiological and chemical models.

At a glancePlain English, then the evidence
Not graded

What kind of compound

Peptide

Growth hormone secretagogue.

Human testing on file

0human records

0 animal · 0 total indexed. No plain-English evidence summary on file.

Regulatory position

FDA compounding Category 2

Studied for

Growth hormone secretagogues

Reviewed 15 September 2026

Known safety concerns in this file

  • No sourced human safety summary is recorded for this compound.

Commonly compared with

No comparison set is recorded for this compound yet.

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1

What is GHRP-2?

GHRP-2 is classified as a growth hormone secretagogue; synthetic hexapeptide containing d-amino acids and 2-naphthylalanine. A synthetic growth hormone-releasing hexapeptide, INN pralmorelin, with no FDA-approved drug product. It is on FDA's active 503B Category 2 table for injectable and nasal routes, and is named on the WADA Prohibited List.

2

Why are people interested in it?

Researchers and clinicians study GHRP-2 primarily to understand its biological interactions, receptor binding affinity, and potential role within its biochemical class.

Primary Research Categories

  • Growth hormone secretagogues
3

How does it work in the body?

GHRP-2 interacts with specific cellular receptors and metabolic pathways corresponding to its structural classification as a growth hormone secretagogue; synthetic hexapeptide containing d-amino acids and 2-naphthylalanine.

In Everyday Language: In laboratory settings, GHRP-2 interacts with specific cellular targets to modulate biological signaling pathways associated with growth hormone secretagogue; synthetic hexapeptide containing d-amino acids and 2-naphthylalanine biology.
Cellular & Receptor Signaling: GHRP-2 interacts with specific cellular receptors and metabolic pathways corresponding to its structural classification as a growth hormone secretagogue; synthetic hexapeptide containing d-amino acids and 2-naphthylalanine.

Biological Pathway Overview

GHRP-2 Receptor & Target Interactions

This compound is evaluated in scientific research for its interactions with target cellular receptors and signaling cascades. Consult the evidence section below for specific peer-reviewed papers.

Target Pathway

Engages specific cellular signaling cascades characteristic of its structural family.

Endocrine/Paracrine Activity

Investigated for its regulatory effects on local tissue synthesis and cellular signaling.

4

What has actually been demonstrated in humans?

Preclinical Models Only (Animal / Lab)

Evidence for GHRP-2 is currently derived primarily from laboratory or preclinical models. Consult the published evidence file for specific indexed studies.

Pharmaceutical Reality vs. Unregulated Research Chemicals

GHRP-2 is not an FDA-approved medication. Always verify chemical identity and testing documentation before interpreting research literature.

5

What is still uncertain or unknown?

Controlled human clinical trials evaluating GHRP-2 for therapeutic efficacy, safety, and pharmacokinetics are limited or absent in peer-reviewed Western registries.

Regulatory Position: GHRP-2 is an investigational or unapproved compound. It is not approved by the FDA as a commercial pharmaceutical.

No evidence records in this file yet.

What Has Actually Been Studied

    What is Still Unknown

    What we know

      Editorial reading of the records below, labelled as Therapept analysis. How records are built

      What remains uncertain

        Preparation and Handling

        Lyophilized peptides ship as freeze-dried powders; whatever happens next involves diluents, concentrations and storage conditions that are compound- and product-specific.

        United States Regulatory Status

        FDA compounding Category 2

        • No approved drug product exists in Drugs@FDA.
        • Listed by FDA as “Growth hormone releasing peptide-2 (GHRP-2)” on the active Category 2 table for 503B compounding, for injectable and nasal routes of administration, added 29 September 2023.
        • FDA's published concerns include immunogenicity risk from aggregation and peptide-related impurities, the added characterisation complexity of an unnatural amino acid, and reports of serious adverse events in patients who received GHRP-2.
        • No registered studies were returned by ClinicalTrials.gov for the intervention name GHRP-2 at review.

        WADA Anti-Doping Status

        Named at S2.2.4 among GH-releasing peptides, as “GHRP-2 (pralmorelin)”. Prohibited at all times.

        Technical Chemical SpecificationsClick to view CAS, sequence, and molecular formulas
        Molecular weight
        818.0 g/mol
        Sequence length
        35 chars
        CAS number
        158861-67-7
        PubChem CID
        6918245
        Compound class
        Growth hormone secretagogue; synthetic hexapeptide containing D-amino acids and 2-naphthylalanine
        Sequence
        D-Ala-D-2-Nal-Ala-Trp-D-Phe-Lys-NH2
        Molecular formula
        C45H55N9O6
        Molecular weight
        818.0 g/mol
        CAS number
        158861-67-7
        PubChem CID
        6918245