Risks of Melanotan: TGA to issue fresh warning against 'Barbie drug' The Australian 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 Melanotan II an overview ScienceDirect Topics How Melanotan 2 Affects Hair Colour Especially in Red or Ginger Hair Pure MT2 Melanotan 1 vs. 2: My Summer Journey & Real Results Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn