CJC-1295 vs Ipamorelin: Mechanism, Specs & Reported Ranges Compared
Side-by-side comparison of CJC-1295 and Ipamorelin — receptor mechanism, half-life, vial sizes, reconstitution and reported study arms.
By PX1 Research Team · August 4, 2026
CJC-1295 vs Ipamorelin at a glance
| CJC-1295 | Ipamorelin | |
|---|---|---|
| Class | GHRH analog (with or without DAC) | selective ghrelin receptor (GHS-R) agonist |
| Reported half-life | ~30 min (no-DAC) / ~6–8 days (DAC) | ~2 hours |
| Vial sizes | 5 mg / 10 mg | 5 mg / 10 mg |
| Typical reconstitution | 5 mg + 2 mL = 2.5 mg/mL | 10 mg + 2 mL = 5 mg/mL |
| Research focus | GH-pulse amplitude research | growth-hormone secretagogue research |
Mechanistic difference
CJC-1295 is a GHRH analog acting on the GHRH receptor; ipamorelin is a selective ghrelin-receptor secretagogue. The literature pairs them because they hit two separate inputs to the same axis.
Reported study ranges side by side
CJC-1295
| Study arm | Reported amount | Cadence |
|---|---|---|
| No-DAC arm | 100 mcg | 1–3× daily |
| DAC arm | 1–2 mg | weekly |
Ipamorelin
| Study arm | Reported amount | Cadence |
|---|---|---|
| Standard arm | 200–300 mcg | 1–3× daily |
Practical handling differences
Both arrive lyophilized and shelf-stable. CJC-1295 is typically prepared at 5 mg + 2 mL = 2.5 mg/mL; Ipamorelin at 10 mg + 2 mL = 5 mg/mL. Where half-lives differ, the literature's dosing cadence differs accordingly — longer-acting molecules are described weekly, shorter-acting ones daily or split.
Which one appears in which research context
CJC-1295 shows up primarily in GH-pulse amplitude research. Ipamorelin is used in growth-hormone secretagogue research. They are not interchangeable substitutes; the receptor profile, not the marketing category, determines where each is used.
Documentation and sourcing
Both are supplied at ≥99% HPLC purity with lot-level COAs at /coa. Product pages: CJC-1295 · Ipamorelin.
How PX1 documents every lot
Every PX1 lot ships with HPLC purity, LC-MS identity, residual solvent, moisture (Karl Fischer), sterility and endotoxin data. Lot documentation is published at /purity-reports, /endotoxin-reports and /coa. Synthesis, purification, lyophilization and vial fill happen in U.S. facilities — see /manufacturing-process.
Research use only. PX1 Research supplies compounds for laboratory and in-vitro research. Nothing here is medical advice, a dosing recommendation, or an offer for human or veterinary use. Figures cited are reported from published laboratory literature.