GHRP-2 (5mg) Research Peptide: A Potent Growth Hormone Secretagogue for Endocrine & Metabolic Studies

If your research investigates the hypothalamic-pituitary-somatotropic axis, the regulation of growth hormone (GH) secretion, or the downstream metabolic effects of GH and IGF-1, GHRP-2 (5mg) research peptide offers a precisely defined and extensively validated synthetic tool. GHRP-2 (Growth Hormone Releasing Peptide‑2), also known as Pralmorelin or KP-102, is a synthetic hexapeptide that acts as a potent agonist of the growth hormone secretagogue receptor type 1a (GHS-R1a)—the same receptor targeted by the endogenous peptide ghrelin.

As one of the most potent members of the GHRP family, GHRP-2 has been the subject of extensive research for its robust, dose‑dependent stimulation of GH release, its synergistic interaction with GHRH, and its potential applications in metabolic, anti‑inflammatory, and neurobiological research. This makes GHRP-2 (5mg) research peptide a valuable tool for laboratories investigating GH physiology, receptor pharmacology, muscle protein synthesis, and metabolic regulation.

At Chinese Grey Peptides, we supply high‑purity GHRP-2 (5mg) research peptide to research institutions and wholesale buyers across the United Kingdom, France, Germany, Spain, Sweden, Italy, and the USA. Every batch is lyophilised, HPLC‑verified to ≥98% purity, and accompanied by a Certificate of Analysis (COA), ensuring your investigations into GH regulation, metabolism, and receptor pharmacology begin with uncompromising quality.

What Is GHRP-2 and How Does It Work?

To fully appreciate the research potential of GHRP-2 (5mg) research peptide, it is essential to understand its biochemical structure, its mechanism of action at the GHS-R1a receptor, and its distinct pharmacological properties.

The Synthetic Hexapeptide

GHRP-2 is a synthetic hexapeptide (six amino acids) with the sequence D‑Ala‑D‑2‑Nal‑Ala‑Trp‑D‑Phe‑Lys‑NH₂. Its molecular formula is C₄₅H₅₅N₉O₆, and its molecular weight is approximately 817.99 g/mol. It has a CAS number of 158861‑67‑7. The peptide is structurally distinct from GHRP-6 yet acts through the same receptor and mechanism. It was developed as a highly potent GH-releasing peptide and has been investigated for its potential as a diagnostic agent for growth hormone deficiency. It has a short half‑life, with peak concentrations occurring around 15 minutes and not longer than 60 minutes after administration.

Mechanism of Action: GHS‑R1a Agonism and GH Secretion

The biological activity of GHRP-2 (5mg) research peptide is mediated through its potent and selective activation of the growth hormone secretagogue receptor (GHS‑R1a):

• Receptor Binding: GHRP-2 acts as a potent agonist of the GHS-R1a, also known as the ghrelin receptor. This receptor is a G-protein-coupled receptor (GPCR) widely expressed not only in the pituitary and hypothalamus but also in peripheral tissues including the liver, pancreas, heart, and immune system.

• Signalling Cascade: Activation of the GHRP-2-GHS-R1a complex stimulates GH secretion through multiple pathways, including calcium influx via Ca²⁺ channels, protein kinase C (PKC) activation, and cAMP pathway activation.

• GH Secretion: This intracellular signalling cascade culminates in the robust secretion of growth hormone from the pituitary gland. After GHRP-2 administration, there was a 4.5‑fold increase in serum GH relative to baseline values in GH‑deficient patients.

• Synergy with GHRH: GHRP-2 acts synergistically with GHRH to stimulate GH release. This synergy is a key research feature, as the combination of a GHRP and GHRH can produce a GH response significantly greater than either peptide alone.

Pharmacokinetic Profile

GHRP-2 has a short half‑life, with peak concentrations occurring around 15 minutes and not longer than 60 minutes after administration. It has been studied for intravenous, intranasal, and oral administration.

Key Research Applications for GHRP-2 (5mg)

GHRP-2 (5mg) research peptide is a versatile tool with applications spanning several domains of biomedical research.

1. Growth Hormone Axis & Pituitary Function Studies

As a potent GHS-R1a agonist, GHRP-2 is an essential tool for studying the regulation of GH secretion and the hypothalamic‑pituitary‑somatotropic axis. Research applications include:

• GH Secretion Dynamics: Investigating the mechanisms and kinetics of GH release in response to GHS-R1a activation.

• Receptor Pharmacology: Characterising the binding affinity, selectivity, and downstream signalling of GHS-R1a.

• Synergistic Studies: Exploring the synergistic interaction between GHRP-2 and GHRH, and the molecular basis of this synergy.

• Diagnostic Models: Evaluating GHRP-2 as a potential diagnostic tool for GH deficiency.

2. Muscle Protein Synthesis & Body Composition Research

GHRP-2’s ability to stimulate endogenous GH and IGF‑1 secretion makes it a valuable tool for studying muscle metabolism and body composition. Research applications include:

• Muscle Protein Deposition: GHRP-2 enhanced muscle protein deposition mainly by up‑regulating the protein synthesis pathways.

• Cachexia Research: Evaluating GHRP-2’s potential anabolic properties in models of muscle wasting and catabolic stress.

• Attenuation of Muscle Breakdown: GHRP-2 attenuated burn injury‑induced MuRF‑1 and MAFbx expression and muscle proteolysis in rats.

• GH and IGF‑1 Signalling: Studying the downstream effects of GH and IGF‑1 on muscle tissue.

3. Metabolic & Endocrine Research

GHRP-2 has been investigated for its effects on metabolism and endocrine regulation. Research applications include:

• GH/IGF-1 Axis: Studying the effects of GHRP-2 on serum IGF‑1 and hepatic GH receptor expression.

• Lipolysis: Exploring the lipolytic effects of GH and IGF‑1 in adipose tissue.

• Energy Homeostasis: Investigating how GHRP-2 influences metabolic pathways in various nutritional states.

• Appetite Regulation: GHRP-2, like ghrelin, increases food intake in healthy men.

4. Anti‑Inflammatory Research

Emerging research has highlighted GHRP-2’s potential anti‑inflammatory properties:

• Inflammatory Pathway Modulation: The ghrelin agonist GHRP-2 demonstrated anti‑inflammatory effects in arthritic rats.

• Cytokine Research: Studying the effects of GHRP-2 on pro‑inflammatory cytokines and signalling pathways.

5. Neurobiology & Neuroprotection Research

GHRP-2 is thought to participate in neurological processes:

• Neuronal Excitability & Synaptic Plasticity: Ghrelin mimetics such as GHRP-2 may support neuronal excitability, synaptic plasticity, and neurogenesis.

• Neurodegenerative Models: GHRP-2 has been theorized to modulate the secretion of neuropeptides and neurotransmitters, potentially offering a model for studying neurodegenerative conditions such as Alzheimer’s and Parkinson’s diseases.

Chemical & Physical Specifications

Accurate characterisation of GHRP-2 (5mg) research peptide is essential for reproducible experimental design.

Note: The 5 mg mass refers to the weight of the peptide in its lyophilised form. GHRP-2 is typically supplied as a TFA or acetate salt, which enhances aqueous solubility. The D‑amino acid substitutions confer resistance to enzymatic degradation, contributing to its stability and potency.

Reconstitution & Handling Protocol for GHRP-2 (5mg)

Proper reconstitution of GHRP-2 (5mg) research peptide is critical for maintaining its structural integrity and biological activity.

Step 1 – Preparation

• Bring the sealed GHRP-2 vial and your chosen diluent (sterile bacteriostatic water or sterile PBS, pH 5‑7) to room temperature. Condensation can degrade the lyophilised powder.

• Clean your work surface with 70% ethanol and lay out sterile syringes, alcohol wipes and a clean work mat.

Step 2 – Vial Sanitisation

• Wipe the rubber stopper of the GHRP-2 vial with a fresh 70% ethanol wipe. Allow the alcohol to evaporate completely before piercing.

Step 3 – Reconstitution

• Draw your desired volume of diluent into a sterile syringe. A common starting concentration for research applications is 5 mg per 0.5 mL of diluent, yielding a 10 mg/mL stock solution.

• Insert the needle and slowly inject the diluent against the inner glass wall. Do not spray directly onto the lyophilised powder.

• Gently swirl the vial until the solution is clear and fully dissolved. Do not shake vigorously, as shaking can cause denaturation.

Step 4 – Aliquoting & Storage

• Immediately after dissolution, aliquot the reconstituted GHRP-2 into single‑use sterile vials.

• Store aliquots at –20°C. Avoid repeated freeze‑thaw cycles, as peptides are susceptible to degradation.

• Once thawed, store at 2‑8°C and use within 7 days.

• For long‑term storage, it is recommended to add a carrier protein (0.1% HSA or BSA).

Concentration Reference Table

Adjust diluent volume based on your experimental requirements. For cell culture applications, typical working concentrations may range from 0.1‑10 µM.

Storage & Stability Guidelines

Why Choose Chinese Grey Peptides for GHRP-2 (5mg)?

As an authentic licensed peptide supplier based in the USA, we supply GHRP-2 (5mg) research peptide and a wide range of research‑grade compounds under rigorous quality assurance protocols, fully aligned with Google’s E‑E‑A‑T standards (Experience, Expertise, Authoritativeness, Trustworthiness).

• Verified Purity: Independent HPLC analysis with purity guaranteed ≥98% for every batch.

• GMP‑Compliant Manufacturing: All peptides are synthesised under strict quality control conditions.

• Full Traceability: Batch‑specific Certificates of Analysis (COA) are available for every order.

• Wholesale Supply: We serve research institutions, laboratories, and wholesale buyers across the UK, EU, and USA with flexible volume pricing and reliable logistics.

• USA‑Based Regulatory Compliance: All products are supplied strictly as research‑grade chemicals for laboratory use only (RUO).

Researchers across the United States—including those at leading institutions—trust us for fast domestic delivery, transparent documentation and professional technical support.

FAQ: GHRP-2 (5mg) Research Peptide

 What is GHRP-2 (5mg) research peptide?
GHRP-2 (Pralmorelin, KP-102) is a synthetic hexapeptide and a potent agonist of the growth hormone secretagogue receptor (GHS‑R1a), the same receptor targeted by ghrelin. It is used in research to study GH secretion, receptor pharmacology, and metabolic regulation.

 What is the sequence and molecular weight of GHRP-2?
The sequence is D‑Ala‑D‑2‑Nal‑Ala‑Trp‑D‑Phe‑Lys‑NH₂. Its molecular formula is C₄₅H₅₅N₉O₆, and its molecular weight is approximately 817.99 g/mol.

 How does GHRP-2 stimulate GH release?
GHRP-2 binds to GHS-R1a on pituitary somatotrophs, triggering signalling pathways including calcium influx via Ca²⁺ channels, protein kinase C activation, and cAMP pathway activation. It stimulates GH release in a dose‑dependent manner and acts synergistically with GHRH.

 What are the primary research applications for GHRP-2?
GHRP-2 is used in growth hormone axis and pituitary function studies, muscle protein synthesis and body composition research, metabolic and endocrine research, anti‑inflammatory research, and neurobiology and neuroprotection studies.

How does GHRP-2 differ from GHRP-6 in research?
GHRP-2 and GHRP-6 act through the same receptor and mechanism, but they are structurally distinct peptides. In some research models, GHRP-2 has been identified as the more potent of the two.

 What purity does your GHRP-2 (5mg) meet?
Our GHRP-2 is tested to ≥98% purity by HPLC. A Certificate of Analysis (COA) is supplied with every order.

 How should I reconstitute GHRP-2 (5mg)?
Reconstitute with sterile bacteriostatic water or sterile PBS (pH 5‑7). Allow the vial to reach room temperature, then slowly inject the diluent against the inner glass wall and swirl gently. Do not shake. A typical starting concentration is 10 mg/mL.

 How should I store reconstituted GHRP-2?
Reconstituted GHRP-2 should be stored at 2‑8°C and used within 7 days. For longer storage, aliquot immediately into single‑use vials and store at –20°C for up to 3 months. Avoid repeated freeze‑thaw cycles.

 Is GHRP-2 (5mg) research peptide legal to purchase in the USA?
Yes. GHRP-2 is a laboratory reagent sold for research use only (RUO). It is fully legal to purchase, possess, and use in the United States for legitimate in‑vitro or in‑vivo scientific research, provided it is not marketed with therapeutic claims. Note: GHRP-2 is banned by the World Anti‑Doping Agency (WADA) for athletic use.

 Does Chinese Grey Peptides ship internationally?
Yes. We ship across the UK, Europe (France, Germany, Spain, Sweden, Italy), and the USA from our US warehouse. Wholesale pricing is available for bulk orders.

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• PubChem Pralmorelin / GHRP-2
• WADA Growth Hormone Releasing Factors Testing Guide
• USADA GHRP-2 sanction reference
• FDA Gram Peptides warning letter
• Google Merchant Listing Structured Data
• Rank Math WooCommerce Product Schema

Ships to USA, Canada, UK & Europe

Chinese Grey Peptides supports shipping to the USA, Canada, the United Kingdom, France, Germany, Spain, Sweden, Italy, and Europe where permitted.

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Shipping times may vary by order size, carrier, destination, customs process, product status, and local requirements.

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Chinese Grey Peptides focuses on quality, support, and clear communication. We help buyers review product details before placing an order.

Customers choose us for:

• Professional peptide supplier support
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We aim to make the buying process transparent, professional, and documentation-focused.

Important Compliance Notice

GHRP-2 5mg may be regulated differently depending on the country, product type, labeling, intended use, buyer type, and destination. Chinese Grey Peptides does not provide medical advice, dosing instructions, injection guidance, growth hormone claims, anti-aging claims, muscle-growth claims, fat-loss claims, recovery claims, athletic-performance claims, bodybuilding claims, disease claims, treatment claims, or personal-use recommendations.

Customers are responsible for understanding and following all local laws, import rules, prescription requirements, compounding rules, sport-governing rules, and permitted-use requirements before ordering.

From its discovery as a potent growth hormone secretagogue to its well‑characterised role as a GHS-R1a agonist with synergistic GH‑releasing activity, GHRP-2 (5mg) research peptide provides a precisely defined and extensively validated platform for advanced endocrinological and metabolic research. Its ability to elicit robust, dose‑dependent GH release, its synergy with GHRH, and its emerging anti‑inflammatory and neuroprotective properties—supported by peer‑reviewed research published in PubMed, Frontiers in Endocrinology, and other authoritative journals—makes it a valuable addition to any laboratory investigating GH physiology, receptor pharmacology, muscle metabolism, or metabolic regulation. By choosing high‑purity, lab‑verified GHRP-2 (5mg) research peptide from Chinese Grey Peptides, you ensure that your research is built on a foundation of quality, reproducibility, and scientific integrity.

Ready to advance your research with GHRP-2 (5mg)? Browse our product catalogue, request a wholesale quote, or contact our support team today to discuss your laboratory’s specific needs. Place your order now and receive GMP‑grade GHRP-2 delivered directly to your facility in the USA, UK, or Europe.