GHRP-2 is a synthetic ghrelin analogue. Like ghrelin, it stimulates release of endogenous growth hormone from somatotropes in the anterior pituitary; also like ghrelin, it is synergistic with endogenous growth hormone releasing-hormone (GHRH) as well as with synthetic GHRH analogues such as Sermorelin or GRF(1-29). Whereas GHRP-2 and other ghrelin analogues increase the number of somatotropes involved in the GH pulse by inhibiting somatostatin, GHRH increases the pulse amplitude per pituitary cell or somatotrope by other means. Unlike ghrelin, GHRP-2 is not lipogenic meaning it does not induce fat storage. While ghrelin has a very important role in hunger, GHRP-2 as an analog of ghrelin does not increase appetite significantly.

GHRP-2 is one of the best stimulants somatropin (growth hormone HGH) currently, while the combination of GHRP-6 and GHRP-2 leads to a synergistic effect and even better the achieved level of GH.

GHRP-2 significantly stimulates the natural production of the natural endogenous growth hormone in the pituitary.