Research Comparison
GHRP-6 vs Ipamorelin
A side-by-side research comparison of GHRP-6 and Ipamorelin drawn from Cobalt Peptides' peptide database records.
GHRP-6
GHRP-6 (Growth Hormone Releasing Peptide-6) is a synthetic hexapeptide belonging to the growth hormone secretagogue (GHS) class. It stimulates endogenous growth hormone (GH) release via activation of the ghrelin receptor (GHS-R1a) in the hypothalamus and anterior pituitary. As one of the earliest developed GHRPs, GHRP-6 is well-characterised and widely used in research investigating GH pulsatility, appetite signalling, and metabolic regulation. It is known for its strong orexigenic (appetite-stimulating) effects in addition to GH release.
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.