GHRP-2 10mg (Growth Hormone Releasing Peptide-2) – Premium Research Grade
Synthetic Hexapeptide | High-Affinity GHS-R1a Agonist | ≥99% Purity | HPLC-Tested | Lyophilized Powder
Product Overview
GHRP-2 (Growth Hormone Releasing Peptide-2) is a synthetic hexapeptide and second-generation growth hormone secretagogue developed to improve upon the GHS-R1a binding affinity of first-generation compounds like GHRP-6. This 10mg research-grade formulation provides laboratories with a high-purity, HPLC-verified compound for investigating ghrelin receptor pharmacology, growth hormone secretion pathway modulation, IGF-1 signalling, appetite regulation mechanisms, and immune-endocrine crosstalk in controlled experimental models.
GHRP-2’s defining characteristic within the GHRP family is its higher GHS-R1a binding affinity compared to GHRP-6, producing stronger GH secretagogue responses at equivalent molar concentrations in research models. This potency profile, combined with its well-characterised receptor pharmacology and extensive research literature, makes GHRP-2 the preferred compound for studies requiring maximal GHS-R1a activation as an experimental condition — and a valuable comparative reference for researchers studying GHS-R1a pharmacology across multiple secretagogue compounds.
What is GHRP-2 and Why is it Researched?
GHRP-2 Peptide was developed as part of the systematic GHRP compound series — alongside GHRP-6, GHRP-1, and later Ipamorelin — designed to characterise the growth hormone secretagogue receptor and develop more potent, selective GHS-R1a agonists for research use. Where GHRP-6 established the foundational GHS-R1a pharmacology, GHRP-2 advanced the field with higher receptor binding affinity and more pronounced GH secretagogue activity.
Beyond its role in GH axis research, GHRP-2 is studied for its interactions with appetite regulation pathways, immune system signalling, and cardioprotective mechanisms — reflecting the broad biological roles of the ghrelin receptor system that extend well beyond growth hormone secretion. These multiple research dimensions make GHRP-2 one of the most multifaceted compounds in the growth hormone secretagogue research category.
Mechanism of Action
GHRP-2 activates the growth hormone secretagogue axis through specific high-affinity receptor engagement:
High-Affinity GHS-R1a Binding — GHRP-2 binds GHS-R1a with higher affinity than GHRP-6, activating Gq protein-coupled intracellular signalling including phospholipase C activation, IP3-mediated calcium release, and PKC pathway stimulation. This cascade drives GH synthesis and secretion from pituitary somatotroph cells with greater potency than first-generation GHRPs in equivalent concentration research models.
Dual GH-Releasing Mechanism — Like GHRP-6, GHRP-2 stimulates GH release through both direct pituitary GHS-R1a activation and indirect hypothalamic GHRH release stimulation. Researchers use GHRP-2 alongside CJC-1295 without DAC to study synergistic GH axis stimulation through complementary GHRHR and GHS-R1a receptor mechanisms simultaneously.
IGF-1 Pathway Stimulation — GHRP-2-stimulated GH secretion drives hepatic IGF-1 production, enabling researchers to investigate downstream IGF-1 signalling cascades including PI3K/Akt and MAPK/ERK pathway activation in the context of GHS-R1a-initiated GH pulses.
Appetite & Ghrelin System Research — GHS-R1a activation by GHRP-2 influences appetite-regulating pathways in the hypothalamus, making it a useful tool for researchers studying how ghrelin receptor signalling modulates food intake regulation and energy homeostasis — research that complements metabolic studies using GLP-1 compounds like Semaglutide and Tirzepatide.
Immune-Endocrine Crosstalk Research — GHS-R1a receptors are expressed on immune cells including macrophages and T-lymphocytes. GHRP-2 provides researchers with a tool for investigating how ghrelin receptor signalling influences immune cell function, cytokine production, and the interface between the endocrine and immune systems.
GHRP-2 vs GHRP-6 vs Ipamorelin — Research Comparison
| Property | GHRP-2 | GHRP-6 | Ipamorelin |
|---|---|---|---|
| GHS-R1a affinity | High | Moderate | High |
| GH secretagogue potency | High | Moderate | Moderate-High |
| Selectivity | Moderate | Moderate | High (selective) |
| Cortisol/prolactin effects | Moderate elevation | Moderate elevation | Minimal |
| Research application | High-potency GHS-R1a studies | Reference compound | Selective GHS-R1a studies |
Research Applications
GHRP-2 10mg is suited for laboratory investigations including:
- High-affinity GHS-R1a receptor pharmacology and binding studies
- Growth hormone secretion pathway and pituitary somatotroph research
- Comparative GHRP potency studies alongside GHRP-6 and Ipamorelin
- Synergistic GH axis stimulation research with CJC-1295 without DAC
- IGF-1 signalling cascade and downstream anabolic pathway investigations
- Ghrelin system and appetite regulation pathway research
- Immune-endocrine crosstalk and GHS-R1a immune cell signalling studies
- Metabolic regulation and energy homeostasis pathway research
- Comprehensive growth hormone axis studies in our growth hormone & muscle peptides category
Product Specifications
| Property | Detail |
|---|---|
| Peptide Type | Synthetic hexapeptide GHS-R1a agonist |
| Full Name | Growth Hormone Releasing Peptide-2 |
| Quantity | 10mg per vial |
| Amino Acid Length | 6 amino acids |
| Target Receptor | GHS-R1a (ghrelin receptor) |
| GHS-R1a Affinity | Higher than GHRP-6 |
| Form | Lyophilized powder |
| Purity | ≥99% (HPLC verified) |
| Category | Growth hormone & muscle research |
| Storage | -20°C long-term, 4°C short-term |
Storage & Reconstitution
Store lyophilized GHRP-2 at -20°C for long-term stability or at 4°C for use within 4–6 weeks. Protect from light and moisture at all times and keep vials tightly sealed until ready for use. Reconstitute with bacteriostatic water under sterile laboratory conditions. All reconstitution supplies are available in our accessories category.
Frequently Asked Questions — GHRP-2 10mg
What is GHRP-2 used for in research? GHRP-2 is used in laboratory research to investigate high-affinity GHS-R1a receptor pharmacology, growth hormone secretion pathway modulation, IGF-1 signalling cascades, appetite regulation mechanisms, and immune-endocrine crosstalk. Its higher GHS-R1a binding affinity compared to GHRP-6 makes it the preferred compound for studies requiring maximal ghrelin receptor activation.
How does GHRP-2 differ from GHRP-6? Both are GHS-R1a agonists but GHRP-2 has higher receptor binding affinity, producing stronger GH secretagogue responses at equivalent concentrations. GHRP-6 is the original characterised compound with the most extensive historical research literature. Researchers use both comparatively to study how GHS-R1a binding affinity differences translate into differential downstream signalling responses.
Why is GHRP-2 often studied alongside CJC-1295 without DAC? GHRP-2 activates GHS-R1a (ghrelin receptor) while CJC-1295 without DAC activates GHRHR (GHRH receptor) — two distinct but synergistic GH-stimulating receptor pathways. Researchers use both together to study how simultaneous activation of complementary GH axis receptors produces synergistic GH secretion responses exceeding either compound alone.
How does GHRP-2 compare to Ipamorelin in research? Ipamorelin has high GHS-R1a selectivity with minimal off-target receptor activity, producing fewer secondary hormonal effects in research models. GHRP-2 has higher raw GHS-R1a binding affinity but moderate selectivity, with some elevation of cortisol and prolactin in research models. Researchers choose between them based on whether maximal GHS-R1a activation or receptor selectivity is the priority.
What purity level is your GHRP-2? Every batch is HPLC-tested to ≥99% purity. Certificates of Analysis are available on request for all orders.
How should GHRP-2 be stored? Store at -20°C for long-term use or at 4°C for short-term use within 4–6 weeks. Keep away from light and moisture and store in a sealed vial until reconstitution.
Do you offer bulk pricing on GHRP-2? Yes. Bulk discounts are available for research institutions and laboratories. Contact us directly for volume pricing details.
For research and laboratory use only. Not intended for human or veterinary consumption. Not for use in the diagnosis, treatment, cure, or prevention of any disease.
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