CW
Retatrutide purity was outstanding
Running metabolic assays with Retatrutide. Lot had >99% purity by reverse-phase HPLC — above spec. Mass spec confirmed molecular weight. Best peptide supplier we've worked with.
HPLC Verified
>98% Purity
COA Included
APEX Performance & Metabolic
GHRP-6
$40.0
GHRP-6 is a synthetic hexapeptide and first-generation growth hormone secretagogue. It stimulates GH release via GHS-R1a agonism and is studied in GH deficiency, appetite regulation, and GI motility research. Notable for its ghrelin-mimetic hunger stimulation.
| Format | Lyophilized Vial |
|---|---|
| Dosage | 5mg |
| Purity | >98% |
| Sub-Line | APEX |
In Stock — Overnight and 2–3 day delivery available
Product Information
GHRP-6 | First-Generation GH Secretagogue — Research Grade
GHRP-6 (His-D-Trp-Ala-Trp-D-Phe-Lys-NH2) is a synthetic hexapeptide and one of the first characterised growth hormone secretagogues (GHS). It acts as a potent ghrelin receptor (GHS-R1a) agonist and has been used as a reference compound in GH secretagogue pharmacology.
Mechanism of Action
- GHS-R1a agonism — potent activation of the ghrelin receptor in the pituitary and hypothalamus, stimulating robust GH pulse release
- Ghrelin-mimetic — mimics endogenous ghrelin signalling including strong appetite/hunger stimulation (orexigenic effect)
- Cortisol/prolactin elevation — raises ACTH, cortisol, and prolactin at higher doses, distinguishing it from Ipamorelin
- IGF-1 downstream elevation — GH-mediated increase in hepatic IGF-1 studied in deficiency models
Research Areas
GHRP-6 is studied in GH deficiency, cachexia, appetite regulation, GI motility (gastroparesis models), and as a reference secretagogue in GHS pharmacology.
For Research Use Only. Rainbow Peptide supplies GHRP-6 exclusively for in vitro and laboratory research purposes. Not for human or veterinary use.
Frequently Asked Questions
- What is GHRP-6?
- GHRP-6 is a synthetic hexapeptide and first-generation growth hormone secretagogue. It stimulates GH release via GHS-R1a agonism and is studied in GH deficiency, appetite regulation, and GI motility research. Notable for its ghrelin-mimetic hunger stimulation.
- Is GHRP-6 for sale at Rainbow Peptide?
- Yes. GHRP-6 is available for purchase with Certificate of Analysis confirming >98% HPLC purity. Every order Overnight and 2–3 day delivery available. For Research Use Only.
- What purity is your GHRP-6?
- Rainbow Peptide's GHRP-6 is >98% pure, HPLC verified by an accredited third-party laboratory. A COA is included with every order.
- Is GHRP-6 safe for human use?
- No. GHRP-6 is strictly For Research Use Only (RUO). It is not intended for human consumption and is not intended to diagnose, treat, cure, or prevent any disease.
- How quickly does GHRP-6 ship?
- Overnight and 2–3 day delivery available. Ships in temperature-controlled packaging.
Third-Party Verified
Every Order Ships with a Certificate of Analysis
We don't just claim purity — we prove it. Every batch of GHRP-6 is independently tested by an accredited third-party laboratory before it reaches you. Your COA is linked to your specific lot number.
- HPLC purity analysis — minimum threshold >98%
- Mass spectrometry — molecular weight confirmation
- Lot number traceable to your order
- Endotoxin limits verified — safe for cell-based assays
RAINBOW PEPTIDE LABS CERTIFICATE OF ANALYSIS
Product GHRP-6
Lot # RP-00033-A
HPLC Purity >98.0% >98.5% PASS
Mass Spec (MW) Confirmed Confirmed PASS
Endotoxin <1 EU/mg <0.5 EU/mg PASS
Visual Inspection White powder White powder PASS
What Researchers Say
Verified purchases from active research labs and scientists
5.00
★★★★★
2 verified reviews DP
Ipamorelin quality confirmed via QC
Internal verification confirmed COA data. Purity was 98.6% HPLC. Peptide behavior in our assay was consistent with published data. Will order again for next study phase.
BS
Consistent performance for research
AOD-9604 arrived quickly and in excellent condition. Cold pack preserved temperature. COA was thorough. Results in metabolic assays consistent with expected parameters.
