GHRP-6 (5 mg) — Research Peptide

GHRP-6 (Growth Hormone Releasing Peptide-6) is a synthetic hexapeptide belonging to the growth hormone secretagogue (GHS) family. It acts primarily through activation of the GHS-R1a receptor, a G-protein–coupled receptor involved in growth hormone (GH) release, appetite regulation, metabolic signaling, and neuroendocrine pathways. Unlike endogenous ghrelin, GHRP-6 does not require acylation for receptor activation, making it a stable and highly selective research tool.

Specifications

• Synonyms: Growth Hormone Releasing Peptide-6, GHRP6, His-D-Trp-Ala-Trp-D-Phe-Lys-NH₂

• Sequence: H-His-D-Trp-Ala-Trp-D-Phe-Lys-NH₂

• Molecular Formula: C₄₆H₅₆N₁₂O₆

• Molecular Weight: 873.02 g/mol

• Class: Ghrelin mimetic / GHS-R1a agonist / GH secretagogue

Mechanism of Action: GHS-R1a Activation & GH Release

GHRP-6 binds to the growth hormone secretagogue receptor type 1a (GHS-R1a), a receptor also targeted by endogenous ghrelin. Activation triggers:

• Pituitary GH Secretion

Studies show that GHRP-6 increases pulsatile GH release independently of GHRH pathways, enhancing GH amplitude and frequency in animal and human pituitary models
— through PKC, PLC, intracellular Ca²⁺ mobilization, and inhibition of somatostatin signaling.

• Appetite & Metabolic Signaling

GHRP-6 strongly stimulates NPY/AgRP neurons in the hypothalamus, resulting in increased food-seeking behavior in research animals.
This makes it a widely used tool to study appetite regulation and orexigenic pathways.

• Anti-Inflammatory & Tissue-Repair Modulation

Preclinical models demonstrate that GHRP-6 influences:

• fibroblast proliferation

• collagen turnover

• reduced fibrosis formation

• accelerated wound-edge closure

Mechanisms appear linked to CD36 modulation and downstream oxidative-stress pathways.

Experimental Findings in Literature

1. Wound-Healing & Tissue-Repair Research

GHRP-6 has been widely studied for its role in repair processes.

• In murine burn-injury models, GHRP-6 reduced inflammation, decreased neutrophil infiltration, promoted angiogenesis, and accelerated granulation tissue formation.

• GHRP-6 also modulated cytokines, reducing IL-1β, TNF-α, and oxidative markers.

These data support its use as a research tool for studying anti-fibrotic and pro-repair signaling.

2. Anti-Inflammatory & Cytoprotective Activity

Research demonstrates that GHRP-6 interacts with CD36, contributing to cardioprotective and anti-inflammatory actions.

• In ischemia–reperfusion models, GHRP-6 reduced infarct size and improved mitochondrial stability.

• GHRP-6 downregulated inflammatory cytokines and oxidative stress mediators.

These findings suggest it is useful for investigating metabolic inflammation, oxidative injury, and cardiac stress pathways.

3. GH Axis, IGF-1 & Metabolic Studies

GHRP-6 is frequently used in endocrine research to study:

• GH secretion dynamics

• IGF-1 downstream signaling

• synergy with GHRH analogues

• somatostatin inhibition mechanisms

Studies in rodents and primates show that GHRP-6 increases GH pulses and enhances IGF-1 expression in liver and skeletal muscle, making it a powerful model for growth-axis exploration.

4. Appetite, Feeding Behavior & Hypothalamic Neurobiology

Because of its strong orexigenic effect, GHRP-6 is widely used to investigate:

• hypothalamic NPY/AgRP signaling

• ghrelin receptor pathways

• neuroendocrine control of hunger

Researchers consistently report rapid and significant food intake increases following GHRP-6 exposure in small-animal models.

Research Use Only – Important Notice

This GHRP-6 (5 mg) product is supplied strictly for laboratory research purposes.

• Not for human or veterinary use

• Not for diagnostic, therapeutic, or cosmetic purposes

• Intended for controlled in vitro experiments or preclinical animal research

• All descriptions summarize existing scientific findings and do not constitute medical claims

References

1. Martínez Y. et al. “GHRP-6 accelerates wound healing and reduces fibrosis in murine models.” J Pharmacol Exp Ther.
https://pubmed.ncbi.nlm.nih.gov/20519667/

2. Granado M. et al. “GHRP-6 modulates inflammatory cytokines and oxidative stress in muscle-injury models.” Am J Physiol Endocrinol Metab.
https://pubmed.ncbi.nlm.nih.gov/17374609/

3. Nass R. et al. “Stimulation of GH release by GHRP-6 in humans and animal models.” J Clin Endocrinol Metab.
https://pubmed.ncbi.nlm.nih.gov/8398870/

4. Castañeda-Bravo A. et al. “GHRP-6 reduces cytokine-mediated inflammation and tissue damage.” Peptides.
https://pubmed.ncbi.nlm.nih.gov/20153735/

5. Sun Y. et al. “Ghrelin receptor signaling and the pharmacology of GHRP family peptides.” Mol Cell Endocrinol.
https://pubmed.ncbi.nlm.nih.gov/15134870/

6. Bowers CY. “Growth hormone releasing peptides: structure and mechanism.” Endocr Rev.
https://pubmed.ncbi.nlm.nih.gov/16169815/