Research Comparison
GHRP-2 vs Ipamorelin
A side-by-side research comparison of GHRP-2 and Ipamorelin drawn from Cobalt Peptides' peptide database records.
GHRP-2
GHRP-2 (Growth Hormone Releasing Peptide-2) is a synthetic hexapeptide belonging to the growth hormone secretagogue (GHS) class. It stimulates the release of endogenous growth hormone (GH) primarily through activation of the ghrelin receptor (GHS-R1a) in the hypothalamus and pituitary. Unlike GHRH analogs, GHRP-2 acts via a distinct pathway, making it highly synergistic when combined with GHRH-based peptides. It is widely used in research to investigate growth hormone pulsatility, appetite signalling, and metabolic regulation.
Ipamorelin
Ipamorelin is a selective growth hormone releasing peptide (GHRP) that stimulates endogenous growth hormone (GH) secretion via activation of ghrelin (GHS-R1a) receptors in the pituitary. It is characterized by a highly selective profile, producing GH release without significant stimulation of cortisol or prolactin. This selectivity distinguishes it from earlier GHRPs, making it a preferred compound in research focused on body composition, recovery, sleep, and anti-aging. Its ability to preserve physiological GH pulsatility while minimizing off-target endocrine effects has positioned it as a core peptide in GH optimization protocols.