Description
PrymaLab · Research use only
GHRP-6 5mg
GHRP-6 as 5 mg of freeze-dried powder, the smaller of the two vial fills
GHRP-6 is a synthetic six-residue peptide that releases growth hormone through the growth hormone secretagogue receptor, the receptor ghrelin also binds. This vial contains 5 mg of freeze-dried GHRP-6, half the 10 mg main fill, produced and tested as a separate lot. Most research on GHRP-6 concerns its pituitary action, first characterised in the 1980s, and the receptor work that followed.
Specifications
| Property | Value |
|---|---|
| Compound | GHRP-6 Growth hormone-releasing peptide-6 |
| CAS number | 87616-84-0 |
| Molecular formula | C46H56N12O6 |
| Theoretical mass | 873.0 Da |
| Sequence / structure | H-H-[D-Trp]-A-W-[D-Phe]-K-NH₂ (6 residues; C-terminal amide) |
| Label claim | 5 mg/vial |
| Form | Lyophilized (freeze-dried) powder or cake in a sealed glass vial with a rubber stopper and aluminium crimp cap |
| Storage, sealed | −20 °C, desiccated, dark |
| Purity specification | 99.0% or higher by RP-HPLC |
| Lot certificate | Results for the lot now shipping are in the certificate panel on this page |
| Safety data sheet | PL-SDS-064 |
Other fills
This is the 5 mg fill. The GHRP-6 10mg page is the main listing for this compound, with the full research summary and every fill side by side. Other fills: 10 mg.
What the research covers
A 1998 review by Bowers described the growth hormone-releasing peptides as acting on both the hypothalamus and the pituitary, two complementary sites, and argued that they reflect a natural hypothalamic hormone that had not then been identified1. In the first human study, GHRP-6 raised growth hormone in healthy men in proportion to the amount, with no change in LH, FSH, TSH or ACTH2. The full research summary, from the 1984 discovery to the cloning of the receptor, is on the GHRP-6 10 mg vial page.
The GHRP-2 vs GHRP-6 guide covers the literature in more depth.
How each lot is tested
Every lot is tested in PrymaLab’s own laboratory in Ashland, Kentucky before release: RP-HPLC for purity, LC-MS for identity, Karl Fischer titration for water, LAL for endotoxin and USP <71> for sterility. The results for the lot now shipping are in the certificate panel on this page, and the certificate number, key and QR code can be checked on the verify page. These are in-house results from PrymaLab Analytical, not an independent test, and the lab is not accredited to ISO 17025. The third-party testing guarantee on this page still applies: if any independent laboratory finds the wrong compound, or less than the stated purity or amount, the order is refunded and the cost of the test is reimbursed.
Frequently asked questions
Does the 5 mg vial hold the same GHRP-6 as the 10 mg?
Yes. The sequence is His-D-Trp-Ala-Trp-D-Phe-Lys-NH2, with a C-terminal amide and a theoretical mass of 873.0 Da, in both fills. Each fill is made as its own lot, so check the lot number on the vial against its own certificate.
How much GHRP-6 is in the vial in molar terms?
About 5.7 µmol, worked out from the theoretical mass of 873.0 Da. Because the powder also contains some residual water, reported as a percentage on the certificate, the true peptide content is slightly below that figure.
How is the sealed vial stored?
At −20 °C, desiccated and dark. GHRP-6 carries two tryptophan residues, so light protection matters for the powder and for any solution made from it, which should be kept at 2 to 8 °C.
References
- Bowers CY. Growth hormone-releasing peptide (GHRP). Cell Mol Life Sci. 1998;54(12):1316-29. DOI · PubMed
- Ilson BE, Jorkasky DK, Curnow RT, et al. Effect of a new synthetic hexapeptide to selectively stimulate growth hormone release in healthy human subjects. J Clin Endocrinol Metab. 1989;69(1):212-4. DOI · PubMed
Research use only
For laboratory research use only. GHRP-6 5mg is not a drug, food, cosmetic or dietary supplement, is not approved by the FDA or any comparable authority for human or veterinary use, and must not be given to people or animals. It is sold to qualified researchers and institutions, and the buyer is responsible for lawful handling and disposal.
Other formats of GHRP-6
GHRP-6 is also stocked as GHRP-6 10mg Nasal Spray and GHRP-6 10mg preloaded 3ml pen. Each listing states its own quantity and concentration, and the pen and vial comparison explains what changes between formats.
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