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 (Tan Jabs): Why They're Not Worth The Risk Figure 4 from Changes of melanocytic lesions inducedby Melanotan injections and sun bed use ina teenage patient with FAMMM syndrome Semantic Scholar How Melanotan 2 Affects Hair Colour Especially in Red or Ginger Hair Pure MT2 Melanotan II (Tan Jabs): Why They're Not Worth The Risk Tanning peptides like melanotan are trending online, but theyre not approved, not regulated, and illegal to advertise in Australia. When products havent been properly tested, theres no way to know