Select Strength — 5mg
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For in vitro laboratory research use only. Not for human consumption, diagnostic, or therapeutic use.
Research Data
Mechanisms of Action
Data presented from peer-reviewed in vitro studies. All findings are laboratory observations only.
In this landmark 1998 study, Ipamorelin was demonstrated to be the most selective GHRP yet characterised — producing maximal GH release via GHSR-1a with no measurable effect on ACTH, cortisol, prolactin, or FSH in both rat and porcine models.
Combined GHRH/GHRP stimulation produces non-additive, synergistic GH secretion by simultaneously amplifying somatotroph pulse amplitude (via CJC-1295) and frequency (via Ipamorelin). The 5.8× GH pulse amplitude exceeds either compound alone.
Repeated pulsatile GH stimulation via Ipamorelin produces dose-dependent IGF-1 elevation through hepatic JAK2-STAT5 signalling. IGF-1 increases of 1.7× above baseline have been consistently observed in pulsatile GH-stimulation models.
Ipamorelin stimulates GHSR-1a to produce clean GH pulses with 2.8× amplitude increase over baseline — with zero cortisol, ACTH, or prolactin co-elevation, distinguishing it from all other GHRPs in selectivity.
Analytical Data
| Specification | Value |
|---|---|
| CAS Number | 170851-70-4 |
| Molecular Formula | C₃₈H₄₉N₉O₅ |
| Molecular Weight | 711.86 g/mol |
| Purity (HPLC) | 99.2% |
| Appearance | White lyophilised powder |
| Solubility | Soluble in water (1 mg/mL) |
| Storage | −20°C long-term / 2–8°C short-term |
| Shelf Life | 24 months from production date |
| Research Grade | Yes — For In Vitro Use Only |
What Research Has Shown
GHSR-1a Selectivity Study — Endocrinology 1998
GH Pulse Amplitude vs. Baseline (No Cortisol / Prolactin Elevation)
Comparative Activity Profile
In Vitro Safety Data
Ipamorelin demonstrates the cleanest safety profile of any GHRP in published preclinical models. Zero cortisol, ACTH, or prolactin elevation at effective GH-stimulating doses — a unique differentiator.
Observed Adverse Indicators
Cortisol elevation
NoneProlactin elevation
NoneCytotoxicity at 1 nM
NoneOff-target receptor binding
None⚠️ Theoretical Concern
Ipamorelin stimulates GHSR-1a to produce pulsatile GH release. Researchers should account for downstream IGF-1 axis activation. This is the expected and intended effect — not an adverse finding.
Researcher Reference
Ipamorelin is the most selective GHRP identified, stimulating GH release exclusively via GHSR-1a with zero effect on cortisol, ACTH, prolactin, or FSH — unlike GHRP-2 and GHRP-6 which elevate cortisol and prolactin at effective doses.
CJC-1295 and Ipamorelin work on different receptors (GHRH-R vs. GHSR-1a), producing synergistic GH pulses of 5.8× amplitude — far exceeding either compound alone.
Lyophilised: −20°C up to 24 months. Reconstituted: 4°C, use within 21 days. Do not freeze reconstituted solution.
Peer-Reviewed Literature
All citations refer to published peer-reviewed in vitro research. Data presented for scientific reference only. No claims made regarding human therapeutic use.
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