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doi: 10.1126/scisignal.adr2008 153 ZengSWuFChenMLiYYouMZhangYet al

An Aib-His-D-2-Nal-D-Phe-Lys-NH2 pentapeptide that potently and selectively activates the growth hormone secretagogue receptor (GHS-R1a) in pituitary somatotroph cells to drive growth hormone release with a receptor selectivity profile that eliminates the prolactin and cortisol co-secretion characteristic of first-generation GH secretagogues including GHRP-6 and GHRP-2 and making it an indispensable research tool for studying GHS-R1a receptor pharmacology and Gq/11-calcium signal transduction, the structural determinants of GHS-R1a subtype selectivity separating GH release from prolactin and cortisol co-stimulation, pituitary somatotroph cell biology and selective GH secretory mechanisms, the complementary and synergistic regulation of GH release by GHRH and selective GHS-R1a agonists, IGF-1 axis downstream biology under selective GH stimulation, the comparative pharmacology of selective versus non-selective growth hormone secretagogues across the GHS-R1a agonist class, and the ghrelin axis biology of selective receptor engagement without the endocrine co-secretion confounds of first-generation GH secretagogue research, Researchers and institutions across Ireland can source verified, research-grade Ipamorelin directly from our Irish peptide supply, with domestic-speed dispatch and complete batch documentation

Some patients benefit from weekly injections initially, tapering to monthly maintenance once levels normalize