Figure 3 from Ipamorelin, the first selective growth hormone secretagogue. Semantic Scholar GHRP 6: A peptide that signals growth and hunger? GHRP 6 is a growth hormone releasing hexapeptide. Unlike synthetic GH, it works by triggering your body's natural secretion. What research explores: Muscle preservation Peptide Series. Vol 5. Ipamorelin What you need to know, This one gets a lot of attention because it boosts growth hormone without spiking cortisol., That's rare., Most older GH peptides (GHRP 6, Ipamorelin & GHRP 2 Research Into Growth Hormone Secretion