All products are sold for Research Use Only. They are not drugs, foods, supplements, or cosmetics, are not approved by the FDA, and are not intended to diagnose, treat, cure, or prevent any disease, or for human or veterinary consumption. To continue you confirm that you are a qualified research professional aged 21 or older.
For research use only. Not for human or veterinary consumption. Not a drug, supplement, or food.
GHRP-6, short for growth hormone releasing hexapeptide-6, is a synthetic six-amino-acid peptide that acts on the ghrelin receptor and has been used for decades as a reference compound in endocrine and receptor-signaling research. Synex Bio Labs supplies GHRP-6 as a lyophilized research peptide for in-vitro and laboratory use, with documentation so that researchers can verify identity and purity before starting work. This page explains what GHRP-6 is, how it is studied, what quality documentation to expect, and how to handle the material.
GHRP-6 is a synthetic hexapeptide with the sequence His-D-Trp-Ala-Trp-D-Phe-Lys-NH2. It contains two D-amino acids and an amidated C-terminus, which make it more resistant to enzymatic breakdown than a chain of natural L-amino acids would be. Its molecular weight is approximately 873 daltons, which makes it a small peptide that is relatively straightforward to synthesize and analyze.
GHRP-6 belongs to the family of growth hormone secretagogues. It was characterized before the natural ligand of its target receptor, ghrelin, had been identified, and it remains an important tool in the literature. Published work is searchable on PubMed, and registered studies appear on ClinicalTrials.gov.
GHRP-6 is not an approved medicine. The GHRP-6 offered by Synex Bio Labs is sold strictly as a laboratory research material, and nothing on this page is a claim about effects in people.
GHRP-6 is an agonist of the growth hormone secretagogue receptor 1a (GHS-R1a), also called the ghrelin receptor. This G-protein-coupled receptor is expressed in the pituitary, the hypothalamus, and other tissues, and it is involved in several signaling pathways. In preclinical research, laboratories use GHRP-6 to examine:
Because GHRP-6 is small, well characterized, and widely cited, it is often used as a benchmark when researchers evaluate a new ghrelin receptor ligand. Comparing results across secretagogues also helps clarify how structure relates to receptor activity.
| Specification | Detail |
|---|---|
| Product name | GHRP-6 (Growth Hormone Releasing Hexapeptide-6) |
| Class | Synthetic hexapeptide, ghrelin receptor (GHS-R1a) agonist |
| Sequence | His-D-Trp-Ala-Trp-D-Phe-Lys-NH2 |
| Molecular weight | ~873 Da [confirm from your COA] |
| Format | Lyophilized (freeze-dried) powder |
| Vial size | [e.g., 5 mg / 10 mg, confirm] |
| Purity (HPLC) | [state only your real figure from the COA] |
| Salt form | [e.g., acetate, confirm from COA] |
| Identity confirmation | [Mass spectrometry, confirm] |
| Storage | Store cold, dry, and protected from light |
| Intended use | In-vitro and laboratory research only |
GHRP-6 is short, but that does not make it immune to quality problems. Two tryptophan residues make the peptide sensitive to oxidation, and the D-amino acids must be incorporated in the correct positions. A synthesis that uses the wrong stereoisomer can produce a peptide with the same mass but different activity, and a basic purity number will not reveal it. That is why GHRP-6 should come with documentation that shows identity as well as purity.
Synex Bio Labs supplies each lot of GHRP-6 with [a certificate of analysis. Describe your real process here, e.g., each lot is tested by an independent laboratory and the report is linked on this page]. A credible GHRP-6 COA should include:
HPLC tells you how pure the sample is, and mass spectrometry tells you whether it is the right molecule. You need both. Our guide on how to read a peptide COA (replace URL) explains what to look for, and you can use it to audit any GHRP-6 report you receive, from us or from any other supplier.
A purity percentage from HPLC reflects relative peak area at a single detection wavelength. It does not equal the share of the vial’s mass that is peptide, because water and counter-ions make up part of the powder. If your experiment depends on exact concentrations, ask for net peptide content and base your calculations on it rather than on the stated vial weight. This applies to GHRP-6 as it does to every lyophilized peptide.
Lyophilized GHRP-6 is more stable than the reconstituted peptide, but it still needs careful handling.
Treating handling as part of quality control protects the material you paid to have tested.
Researchers choosing a supplier for GHRP-6 should compare documentation, not marketing. At Synex Bio Labs we aim to provide:
If you are comparing suppliers, our peptide NCE supply guide (replace URL) walks through a complete vetting process.
GHRP-6 is not an approved medicine, and it appears on the World Anti-Doping Agency’s Prohibited List. This product is sold for in-vitro and laboratory research only. It is not intended for human or veterinary use, or for the diagnosis, treatment, or prevention of any condition, and it must not be used as a drug, food, or supplement. By purchasing, you confirm that you are a qualified researcher or represent a research institution and that you will handle the material in line with applicable laws and your institution’s policies. Regulatory positions change, so confirm current guidance for your region before ordering.
What is GHRP-6? GHRP-6 is a synthetic hexapeptide that acts as an agonist at the ghrelin receptor (GHS-R1a). It is a long-standing reference compound in endocrine and receptor-signaling research.
Is GHRP-6 approved for human use? No. It is not an approved medicine, and Synex Bio Labs sells it for laboratory research only.
What is the sequence and molecular weight of GHRP-6? The sequence is His-D-Trp-Ala-Trp-D-Phe-Lys-NH2, and the molecular weight is approximately 873 daltons. [Confirm against your COA.]
What format does the GHRP-6 research peptide come in? It is supplied as a lyophilized powder in a sealed vial. [Confirm vial size and fill.]
Does GHRP-6 come with a certificate of analysis? [Yes, each lot ships with / links to a COA. State your real process.] The report should include HPLC and mass spectrometry data matched to your lot number.
How should I store GHRP-6? Keep the sealed vial cold, dry, and protected from light, and follow the storage instructions on your label and COA.
How does GHRP-6 differ from other secretagogue peptides? GHRP-6, GHRP-2, hexarelin, and ipamorelin are all studied as ghrelin receptor ligands, but they differ in sequence, potency, and selectivity. Researchers often compare them side by side.
Can I ask about a specific batch? Yes. Contact our team (replace URL) with your lot number and we will help with questions about your documentation.
External references: PubMed: GHRP-6, ClinicalTrials.gov: GHRP-6, PubChem, WADA Prohibited List
All products are sold for in-vitro and laboratory research only. Not for human or veterinary use.
Yes. Every lot is independently third-party tested for identity and purity — ≥99% by HPLC and mass spectrometry — with a lot-matched Certificate of Analysis available to download on this page.
Yes. A lot-matched COA is available on this product page and in our COA library before purchase, documenting identity, purity, and full analytical results.
This product is supplied strictly for laboratory and research use only (RUO). It is not a drug, food, supplement, or cosmetic, is not approved by the FDA, and is not intended to diagnose, treat, cure, or prevent any disease, or for human or veterinary consumption.
Orders placed before 12pm CT typically ship the same business day from our U.S. facility with tracking. Store the lyophilized material at -20°C, protected from light and moisture.
