Growth hormone-releasing peptide 6 (GHRP-6) (developmental code name
SKF-110679), also known as growth hormone-releasing hexapeptide, is one
of several synthetic met-enkephalin analogues that include unnatural D-amino
acids, were developed for their growth hormone-releasing activity and are
called growth hormone secretagogues. They lack opioid activity but are
potent stimulators of growth hormone (GH) release. These secretagogues
are distinct from