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CJC-1295 vs Sermorelin vs Ipamorelin: A Research Comparison
These three peptides come up together constantly in growth-hormone-axis research because they act on the same axis from different angles. This comparison summarises how they differ by peptide class and what researchers study them for — strictly as research chemicals.
Quick comparison
| | CJC-1295 | Sermorelin | Ipamorelin |
| --- | --- | --- | --- |
| Class | GHRH analog | GHRH analog (GRF 1-29) | GHRP / ghrelin-receptor agonist |
| Peptide length | 30 aa (mod.) | 29 aa | 5 aa (pentapeptide) |
| Research target | GHRH receptor | GHRH receptor | GHS-R1a (ghrelin) receptor |
| Studied with | Often paired with a GHRP | Standalone GHRH model | Often paired with a GHRH analog |
GHRH analogs vs GHRPs
The key distinction is which receptor the peptide is studied against. CJC-1295 and Sermorelin are GHRH analogs — they are studied at the growth-hormone-releasing-hormone receptor. Ipamorelin is a GHRP (growth-hormone-releasing peptide) studied at the ghrelin receptor (GHS-R1a). Because the two receptor systems are complementary, research protocols often pair a GHRH analog with a GHRP, which is why CJC-1295 and Ipamorelin are so frequently studied together.
CJC-1295 vs Sermorelin
Both are GHRH analogs, but CJC-1295 is a modified, longer-acting analog in model systems, while Sermorelin corresponds to the natural GRF(1-29) fragment. Researchers select between them based on the stability profile their model requires. Read the full CJC-1295 overview →
Where Ipamorelin fits
Ipamorelin is a selective pentapeptide GHRP studied for its receptor selectivity in model systems. It is the GHRP most often paired with a GHRH analog in comparative research. Read the full Ipamorelin overview →
Sourcing verified material
Whichever you study, the sourcing checklist is the same: a lot-specific third-party COA (HPLC purity + mass-spec identity), US synthesis, and cold-chain shipping. Browse the COA library →
FAQ
What is the difference between CJC-1295 and Ipamorelin?
CJC-1295 is a GHRH analog studied at the growth-hormone-releasing-hormone receptor; Ipamorelin is a GHRP studied at the ghrelin receptor (GHS-R1a). They target complementary receptors, which is why they are often studied together in research.
Is Sermorelin the same as CJC-1295?
Both are GHRH analogs, but they are different molecules. Sermorelin corresponds to the natural GRF(1-29) sequence; CJC-1295 is a modified, longer-acting analog in model systems.
Which is best for research?
There is no single best — the choice depends on the receptor system and stability profile a given research model requires. All three are supplied as research chemicals for laboratory use only, not for use in humans or animals.