Nonapeptide-1 acetate salt, a peptide hormone, is a potent α-Melanocyte-stimulating hormone (α-MSH) antagonist, with an IC50 of 11 nM. Reduces synthesis of melanin and helps decrease skin pigmentation to a substantial degree[1].
[1]. Jayawickreme CK, et al. Discovery and structure-function analysis of alpha-melanocyte-stimulating hormone antagonists. J Biol Chem. 1994 Nov 25;269(47):29846-54.
















