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].