Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and Labial Lentigo (labial melanotic macule) Cancer Therapy Advisor Intraoral Cellular Blue Nevus: Report of a Unique Histopathologic Entity and Review of the Literature 05 May 03 Eng Variations of oral anatomy and common oral lesions Anais Brasileiros de Dermatologia (Portuguese)