GHRP-6 (G H–Releasing Peptide-6) is a synthetic peptide that signals the pituitary gland to release more of the body’s own (GH). Unlike HGH, it doesn't directly supply growth hormone.

It works mainly by activating the ghrelin receptor, which is involved in both growth-hormone release and appetite. That's why GHRP-6 is especially known for causing a noticeable increase in hunger.

People researching GHRP-6 are generally interested in its potential effects on GH/IGF-1 signaling, recovery, lean body mass, body composition, sleep, and tissue repair.