The Truth About Melanotan: Tanning Peptide or More? 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 longer lasting than Tanning peptides like melanotan are trending online, but they're not approved, not regulated, and illegal to advertise in Australia. When products haven't been properly tested, there's no way to know what's actually HPRA Warns of Dangerous Melanotan 2 in Tanning Products Obelis Group Melanotan 1 75921 69 6 FM39599 Biosynth