What Caused These Multiple Hyperpigmented Macules of the Mouth? Warning issued over increased use of 'Barbie drug' COM March 2009 Diagnosis UW School of Dentistry 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 Dermpath Made Simple Neoplastic: Oral Tumours