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Research 1 min read25 May 2026

CJC-1295 and Ipamorelin: Growth Hormone Axis Research

CJC-1295 is a long-acting GHRH analogue and ipamorelin is a selective ghrelin mimetic. Research on each compound and their studied effects on GH secretion profiles.

Written by the Peptide Labs Research Team

CJC-1295 is a modified GHRH analogue that activates the GHRH receptor, while ipamorelin is a pentapeptide that activates the ghrelin receptor (GHS-R1a). Researchers pair them because the receptors sit on separate pathways that converge on growth hormone release from pituitary somatotrophs.

How do CJC-1295 and ipamorelin differ?

PropertyCJC-1295Ipamorelin
Receptor targetGHRH-RGHS-R1a (ghrelin receptor)
Molecular weight3647.1 Da711.85 Da
CAS number863288-34-0170851-70-4

CJC-1295 is a tetrasubstituted GHRH(1-29) analogue. Four amino acid substitutions confer DPP-IV resistance, and a maleimidoproprionic acid side chain binds albumin covalently (the Drug Affinity Complex, or DAC). Ipamorelin is a pentapeptide (Aib-His-D-2-Nal-D-Phe-Lys-NH2).

Why are they studied together?

The rationale is that GHRH receptor and GHS-R1a signalling act synergistically in somatotroph physiology. Ipamorelin is characterised as a selective secretagogue, making it a more specific tool than earlier secretagogues for GH axis studies. Our CJC-1295 and Ipamorelin 10mg Blend provides both compounds at research-grade purity, independently HPLC verified with full COA documentation.

PropertyCJC-1295 (with DAC)Ipamorelin
ClassGHRH analogueGhrelin mimetic (GHRP)
TargetGHRH-RGHS-R1a
StructureMod GRF(1-29) + maleimide albumin-binding linkerAib-His-D-2-Nal-D-Phe-Lys-NH₂
Molecular weight~3647.2 Da~711.9 Da
FormulaC₁₆₅H₂₆₉N₄₇O₄₆C₃₈H₄₉N₉O₅
CAS number863288-34-0170851-70-4
Half-lifeSeveral daysNot established
Human evidenceEarly / small human studiesNo published human trials
Studied in
  • Growth hormone axis research
  • Growth hormone axis research
NotesProduces sustained elevation rather than a pulse.Selective: minimal cortisol/prolactin/ACTH effect in published pharmacology.
AvailabilityIn catalogue$159.99In catalogue$74.99

Molecular data from the certificate of analysis for each batch. Half-life and evidence level reflect the published literature cited in our research articles. Research use only.

Research use only

Educational use only. These compounds are sold strictly for in-vitro laboratory and research use. Not medical advice.

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