Nonapeptide-1 (Melanostatine™ 5) can inhibit the synthesis of melanin, which makes it of interest for treating certain skin conditions.

Decapeptide-12, a competitive inhibitor of mushroom tyrosinase with an IC50 of 40 µM and a Kd of 61.1 μM for the C-terminal residue of tyrosinase, is a small oligopeptide that reduces melanin content in melanocytes by interacting with tyrosinase and increasing transcription of SIRT. It is utilized in researching melanogenesis, senescence, and inflammation [1] [2] [3].

Prolylserine, a dipeptide, acts as a melanogenesis inhibitor in Mel-Ab cells by reducing microphthalmia-associated transcription factor (MITF) and tyrosinase expression, inducing phosphorylation of ERK, but not affecting cAMP response element-binding protein (CREB) [1].