Ipamorelin is one of the most requested growth hormone research peptides, and it has a specific claim to fame in the literature. Here is a clear look at what it is and what sets it apart.
What ipamorelin is
Ipamorelin is a synthetic pentapeptide and a growth hormone secretagogue. According to PubMed, it was described as the first selective growth hormone secretagogue. It acts through the ghrelin, or GHRP, receptor to stimulate growth hormone release, with potency similar to the older GHRP compounds in that early research (Raun et al., 1998, DOI).
The selectivity that defined it
The reason ipamorelin stood out is in that same research. The older GHRP class raised additional hormones such as ACTH and cortisol, while ipamorelin released growth hormone without that rise. That selectivity is why it is described as the first selective growth hormone secretagogue, and it is the feature researchers most often point to.
How it relates to CJC-1295 and hexarelin
Ipamorelin shares its receptor pathway with hexarelin, another GHRP-class secretagogue, but is noted as more selective. It works on a different pathway than CJC-1295, which is a GHRH analog. That is why ipamorelin and CJC-1295 are often studied together. For the side by side, see our ipamorelin vs CJC-1295 and hexarelin vs ipamorelin comparisons.
Sourcing ipamorelin
With any popular compound, documentation is what protects you. Look for a per batch Certificate of Analysis you can see before you buy, HPLC purity on the specific lot, mass spectrometry confirmation, and a lot number tied to your vial.
Peptide Hackers carries ipamorelin, along with the CJC-1295 and Ipamorelin blend, with that documentation on every batch. For researchers in the Los Angeles and Orange County areas, you can order online and pick up the same day in person, with shipping available if you prefer delivery. The full catalog is at peptidehackers.com.
All products are for laboratory research only. Not for human or veterinary use.
Research Use Only
This article is provided for educational purposes. All peptides discussed are sold for research use only and are not intended for human consumption or therapeutic use.