Hexarelin Acetate Peptide For Sale
Hexarelin acetate is a synthetic hexapeptide growth hormone secretagogue primarily evaluated in preclinical models to examine growth hormone receptor binding, somatotroph signaling, and cardiac tissue response. Institutional laboratories purchasing hexarelin acetate peptide for sale require analytical verification through high-performance liquid chromatography and mass spectrometry to ensure exact molar concentration, sequence integrity, and low endotoxin thresholds across experimental assays.
Quick answer
Hexarelin acetate is a synthetic hexapeptide growth hormone secretagogue primarily evaluated in preclinical models to examine growth hormone receptor binding, somatotroph signaling, and cardiac tissue response. Institutional laboratories purchasing hexarelin acetate peptide for sale require analytical verification through high-performance liquid chromatography and mass spectrometry to ensure exact molar concentration, sequence integrity, and low endotoxin thresholds across experimental assays.
Key takeaways
- [Hexarelin](/research-peptides/hexarelin) acetate (chemical formula C47H58N12O6, CAS Number 140703-51-1) is a synthetic hexapeptide with the amino acid sequence His-D-Trp-Ala-Trp-D-Phe-Lys-NH2.
- In preclinical model systems, [hexarelin](/research-peptides/hexarelin) acts as a potent agonist at the growth hormone secretagogue receptor type 1a (GHS-R1a), a G-protein coupled receptor predominantly expressed in the anterior pituitary gland and hypothalamus.
- In vitro and animal model evaluations indicate that [hexarelin](/research-peptides/hexarelin) induces a rapid, dose-dependent release of endogenous growth hormone.
- A distinct feature of [hexarelin](/research-peptides/hexarelin) acetate in preclinical literature is its documented cardioprotective capacity in isolated heart models and ischemia-reperfusion injury studies.
Chemical Profile and Structure of Hexarelin Acetate
Hexarelin acetate (chemical formula C47H58N12O6, CAS Number 140703-51-1) is a synthetic hexapeptide with the amino acid sequence His-D-Trp-Ala-Trp-D-Phe-Lys-NH2. It belongs to the growth hormone-releasing peptide (GHRP) class, engineered with unnatural D-amino acids to increase metabolic stability against enzymatic degradation relative to native peptide ligands. Supplied as a lyophilized acetate salt, the compound exhibits high solubility in aqueous buffer systems appropriate for controlled laboratory setups.
When purchasing hexarelin acetate peptide for sale, researchers must account for both molecular mass and net peptide content. While the theoretical monoisotopic mass sits at 886.46 Da, salt content and counterions alter the target mass during reconstitution calculations. PX1 Research delivers lyophilized research compounds with explicit lot-by-lot counterion analysis, ensuring precise molar titrations in structural and cell culture studies. Laboratories can explore our full catalog of research peptides to compare peptide structures and purity standards.
Mechanism of Action: GHS-R1a and CD36 Binding Dynamics
In preclinical model systems, hexarelin acts as a potent agonist at the growth hormone secretagogue receptor type 1a (GHS-R1a), a G-protein coupled receptor predominantly expressed in the anterior pituitary gland and hypothalamus. Binding to GHS-R1a triggers a phospholipase C (PLC)-dependent signal transduction cascade, resulting in the generation of inositol trisphosphate (IP3) and diacylglycerol (DAG). This intracellular signal drives the release of sequestered calcium ions from the endoplasmic reticulum, stimulating exocytosis of growth hormone granules from somatotroph cells.
Beyond its classical neuroendocrine targets, hexarelin demonstrates unique binding affinity for the CD36 scavenger receptor, a transmembrane glycoprotein present on cardiomyocytes, endothelial cells, and macrophages. Preclinical research published in cellular biology literature suggests that CD36 receptor activation by hexarelin modulates lipid metabolism, inflammatory cascades, and cytoprotective mechanisms independently of growth hormone secretion. Detailed mechanisms of secretagogue action and receptor cross-talk are documented in the PX1 research library.
Preclinical Findings: Somatotrophic and Pituitary Axis Signaling
In vitro and animal model evaluations indicate that hexarelin induces a rapid, dose-dependent release of endogenous growth hormone. Rodent models demonstrate that systemic administration of hexarelin elevates peak plasma GH levels to a greater magnitude than equivalent molar concentrations of native Growth Hormone-Releasing Hormone (GHRH). This profound somatotrophic response occurs due to dual mechanisms: direct pituitary somatotroph depolarization and central inhibition of somatostatin tone.
However, preclinical studies also demonstrate rapid receptor desensitization (tachyphylaxis) following repetitive exposure to hexarelin. Continuous administration protocols in animal models show a progressive downregulation of GHS-R1a responsiveness within 72 to 96 hours. This characteristic renders hexarelin a valuable control molecule for studying receptor internalization, arrestin recruitment, and homeostatic recalibration within the somatotrophic axis.
Cardioprotective and Cytoprotective Pathways under Investigation
A distinct feature of hexarelin acetate in preclinical literature is its documented cardioprotective capacity in isolated heart models and ischemia-reperfusion injury studies. Because cardiomyocytes express CD36 receptors, application of hexarelin prior to or during induced ischemic conditions in rodent models has been shown to reduce infarct size, mitigate cardiomyocyte apoptosis, and preserve left ventricular mechanical performance.
In vitro assays on vascular endothelial cells suggest that hexarelin modulates nitric oxide synthase (eNOS) expression, mitigating oxidative stress markers and preventing caspase-3/9 mediated apoptotic cascades. Furthermore, research in rodent models of ischemia suggests that hexarelin signaling suppresses pro-inflammatory cytokine expression, including TNF-alpha and IL-6, within cardiac tissue matrixes. These unique cytoprotective signaling pathways make hexarelin a focal point in cardiovascular pathophysiology research.
Comparative Analysis: Hexarelin vs. Other Growth Hormone Secretagogues
When evaluating candidates within the growth hormone secretagogue class, laboratory investigators frequently analyze differences in receptor affinity, secretagogue potency, and off-target profile. Hexarelin stands out for demonstrating the highest peak GH secretagogue potency per nanomolar concentration among first-generation hexapeptides, but it also carries a higher propensity for inducing rapid receptor desensitization compared to newer, selective non-peptide or truncated peptide analogs.
In direct comparison, Ipamorelin acts as a highly selective GHS-R1a agonist without interacting with CD36 receptors or triggering cortisol and prolactin co-secretion in animal models. Conversely, GHRP-6 and GHRP-2 display intermediate binding profiles but differ in their ghrelin-receptor-mediated appetite activation responses. Laboratories comparing structural analog performance can review detailed comparative benchmarks in our guide on Ipamorelin vs GHRP-6 mechanism analysis.
Reconstitution, Buffer Compatibility, and Solubilization Protocols
Hexarelin acetate is supplied as a lyophilized, sterile cake requiring reconstitution prior to in vitro or in vivo experimental use. To maintain peptide stability and prevent physical aggregation, reconstitution should be performed using sterile, cold bacteriostatic water or sterile 0.9% sodium chloride solution. For specific cell culture assays sensitive to benzyl alcohol, sterile phosphate-buffered saline (PBS, pH 7.4) or 0.1% diluted acetic acid may be substituted.
When adding diluent, the stream should be directed gently against the inner glass wall of the vial rather than directly onto the lyophilized powder. The vial should be gently swirled or inverted; vigorous agitation, shaking, or vortexing must be avoided to prevent shear-stress-induced denaturization and peptide aggregation. Once reconstituted, stock solutions should be handled under laminar flow hoods to preserve sterility throughout experimental series.
Thermal Stability and Storage Guidelines for Laboratory Stock
Lyophilized hexarelin acetate displays robust long-term stability when stored at -20°C or -80°C in a desiccated environment protected from light. Under these conditions, the dry peptide cake maintains structural integrity and analytical purity for extended periods. Reconstitution should only take place immediately prior to planned experimental phases to minimize solution-phase hydrolysis.
Following reconstitution, liquid aliquots should be prepared in low-binding polypropylene microcentrifuge tubes to prevent surface adsorption. Reconstituted solutions stored at 2°C to 8°C remain stable for short-term use (up to 7 days). For longer storage, reconstituted stock must be frozen at -80°C. Repeated freeze-thaw cycles must be strictly avoided, as phase transitions accelerate peptide bond cleavage and aggregate formation.
Analytical Quality Standards: HPLC, Mass Spectrometry, and Endotoxin Limits
Research validity depends entirely on the chemical purity and structural identity of the reagent. When sourcing hexarelin acetate peptide for sale, purchasing managers and principal investigators must mandate rigorous third-party analytical documentation. PX1 Research subjects every production lot to independent analytical validation to guarantee experimental reproducibility.
Purity is verified via Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC), ensuring a minimum threshold of 98.0% purity with clear separation of sequence truncations and deletion synthesis byproducts. Mass Spectrometry (MS) confirms exact molecular weight matching the predicted 886.46 Da identity. Furthermore, bacterial endotoxin testing via Chromogenic Recombinant Factor C or LAL assay verifies endotoxin levels below 0.01 EU/mg, preventing confounding inflammatory responses in sensitive cell lines and tissue preparations.
Sourcing Criteria and Institutional Supply Verification
Selecting a reliable research peptide vendor requires verifying strict domestic manufacturing protocols, facility compliance, and batch-level traceability. Substandard or unverified peptide sources frequently contain unreacted protecting groups, residual heavy metals, TFA salt contamination, or broad lot-to-lot variance that invalidates quantitative assay data.
PX1 Research manufactures peptides in USA-based, GMP-compliant facilities utilizing state-of-the-art solid-phase peptide synthesis (SPPS) equipment. Every batch undergoes testing in ISO 17025 accredited analytical laboratories. Full Certificate of Analysis (COA) documents featuring raw HPLC chromatograms and mass spectra are publicly accessible per lot number. Institutional procurement departments interested in standing supply contracts or bulk quantities can apply directly through our wholesale laboratory supply hub.
Frequently Asked Questions
What is the designated use for Hexarelin Acetate supplied by PX1 Research?
Hexarelin acetate is supplied strictly as a research-grade chemical compound intended solely for in vitro laboratory research, analytical testing, and preclinical animal studies. It is not intended for human or veterinary use, medical treatment, or clinical administration.
What purity level is guaranteed for Hexarelin Acetate?
PX1 Research guarantees a minimum purity of 98.0% as determined by Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC). Mass spectrometry results confirming exact peptide mass are provided on the lot-specific Certificate of Analysis.
How is Hexarelin Acetate shipped and how should it be stored upon receipt?
Hexarelin acetate is shipped in lyophilized form at ambient temperature, owing to its short-term thermal stability in dry state. Upon receipt, the lyophilized powder should be stored at -20°C or -80°C in a dark, desiccated freezer.
What diluent is recommended for reconstituting Hexarelin Acetate?
Reconstitution is recommended using sterile bacteriostatic water, sterile 0.9% sodium chloride, or sterile PBS (pH 7.4), depending on the specific requirements of the downstream in vitro or cell culture protocol.
What is the acceptable endotoxin threshold for PX1 Research peptides?
All research peptides, including hexarelin acetate, are tested for endotoxins and must meet strict limits of <0.01 EU/mg to prevent endotoxin-induced cellular activation or toxicity during preclinical assays.
How does Hexarelin Acetate differ structurally from native GHRH?
Native GHRH is a 44-amino-acid endogenous peptide, whereas Hexarelin Acetate is a synthetic hexapeptide (6 amino acids) featuring modified D-amino acids that confer increased enzymatic resistance and distinct CD36 receptor binding.
Does PX1 Research provide bulk ordering options for university or institutional accounts?
Yes. Institutional accounts, academic institutions, and corporate laboratories can set up supply agreements and bulk ordering via the PX1 Research wholesale procurement portal.
Where can I locate the Certificate of Analysis (COA) for my specific lot of Hexarelin Acetate?
Every product shipped by PX1 Research includes a lot number matching an online, downloadable Certificate of Analysis featuring full HPLC chromatograms, mass spec analysis, and endotoxin verification data.
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All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.