Source comparison
Ipamorelin vs GHRP-2 vs GHRP-6: Within the Secretagogue Class
Ipamorelin is frequently compared to GHRP-2 and GHRP-6 — the other growth hormone secretagogues available from PSPeptides. All three activate the ghrelin receptor (GHS-R1a), but their selectivity profiles differ significantly — a distinction that matters withi
This comparison does not assign a generated winner or score.
- Ipamorelin is frequently compared to GHRP-2 and GHRP-6 — the other growth hormone secretagogues available from PSPeptides. All three activate the ghrelin receptor (GHS-R1a), but their selectivity profiles differ significantly — a distinction that matters within the broader sermorelin vs CJC-1295 vs ipamorelin comparison.
- Ipamorelin is the most selective GH secretagogue. It releases growth hormone without significantly elevating cortisol, prolactin, or ACTH. This clean release profile makes it preferred for research protocols where isolating GH effects from stress hormone interference is important. The tradeoff is a slightly smaller GH pulse per dose compared to GHRP-2.
- GHRP-2 produces the strongest GH release per dose among the growth hormone secretagogues. However, it also stimulates cortisol and prolactin release at higher doses — effects mediated through the same ghrelin receptor pathway but with less selectivity than ipamorelin, a key distinction in the sermorelin vs CJC-1295 vs ipamorelin comparison. For researchers specifically studying maximal GH elevation, GHRP-2 delivers the most potent signal. For research into sleep and recovery peptides, the GH pulse timing from GHRP-2 before sleep is a commonly studied protocol.
- GHRP-6 has the strongest appetite-stimulating effect among the GH secretagogues — a significant increase in hunger driven by ghrelin receptor activation in the hypothalamic feeding centers. It also elevates cortisol and prolactin more than ipamorelin. For researchers studying the intersection of GH release and appetite regulation, GHRP-6 provides a useful tool. For most other applications, ipamorelin’s cleaner profile is preferred, which is why ipamorelin remains the default choice in most sermorelin vs CJC-1295 vs ipamorelin protocols.