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 This guy injected himself with a drug called Melatonan II for 5 months. Here's his before after. : r pics 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 PDF] Melanotan Induced Hyperpigmentation of Oral Soft Tissues Semantic Scholar