The cell in your skin that produces melanin pigment—it determines your skin color and protects against UV radiation.Melanocytes are neural crest-derived cells located in the basal layer of the epidermis, hair follicles, and uveal tract. They synthesize melanin within melanosomes and transfer pigment to surrounding keratinocytes. Melanocyte activity is regulated primarily through MC1R signaling: alpha-MSH binding activates cAMP/MITF/tyrosinase cascade, increasing eumelanin production. Afamelanotide, melanotan I, and alpha-MSH analogs all target this pathway. Melanocyte dysfunction underlies vitiligo; melanocyte malignant transformation produces melanoma.