What is GHRP-2?
GHRP-2 (Growth Hormone Releasing Peptide-2 (hexapeptide)) is a 6-amino acid synthetic hexapeptide. GHSR-1a agonist with robust GH-releasing activity and moderate HPA co-stimulation (cortisol, prolactin) — greater GH pulse amplitude than ipamorelin but more HPA axis co-activation. Used when moderate co-stimulation is acceptable or desired in the research design.
Research Applications
Robust GH Stimulation
Higher GH pulse amplitude than ipamorelin at equivalent dose
HPA Co-activation
Moderate cortisol/prolactin co-stimulation — included in research design
Ghrelin Axis
Intermediate selectivity between ipamorelin and GHRP-6
GH+Cortisol Models
Research requiring GH alongside glucocorticoid activation
Dose-Response
GH amplitude vs dose characterisation and receptor kinetics
Quick Specs
| Form | Lyophilized powder |
| Purity | ≥99% by HPLC — every batch |
| CAS Number | 158861-67-7 |
| Molecular Formula | C₄₄H₅₄N₁₂O₆ |
| Peptide Type | Synthetic Peptide / Growth Hormone Releasing Peptide (GHRP) |
| Identity | MS molecular weight confirmed — every batch |
| COA | Janoshik-independent, publicly verifiable |
| Manufacture | In-house Fmoc SPPS — Qingdao, China |
| Storage | -20°C sealed | 2–8°C reconstituted (2–4 weeks) |
| Shelf Life | 24 months unopened |
Certificate of Analysis (COA)
Frequently Asked Questions
How do I reconstitute GHRP-2 or GHRP-6?
Add 1–2mL bacteriostatic water to the lyophilized vial, directing water down the inner wall. Swirl gently until dissolved. Both GHRP-2 and GHRP-6 are hexapeptides that dissolve readily to a clear, colourless solution.
How should GHRP peptides be stored?
Store lyophilized at −20°C. Reconstituted at 2–8°C for up to 28 days. GHRPs are relatively stable peptides — avoid repeated freeze-thaw and direct UV exposure.
What purity is Vesta GHRP and how is it verified?
Vesta GHRP-2 and GHRP-6 are ≥99% pure by HPLC with MS identity confirmation on every batch. COA is published on the product page and verifiable via Janoshik.
Peptide Research Tools: Use Vesta’s free peptide calculators — reconstitution, BAC water, dosing, half-life, and mixing charts.
Domestic shipping: USA · Canada 5–7 days
International shipping: 7–14 days