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 Figure 4 from Changes of melanocytic lesions inducedby Melanotan injections and sun bed use ina teenage patient with FAMMM syndrome Semantic Scholar We are alerting the public of the serious health risks posed by the unauthorised substance Melanotan 2, often described as a self tanning aid. We strongly advise members of the public not to Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report