Nasal Tanning Sprays: Unregulated Health Risks in the UK 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 PDF) Use of melanotan I and II in the general population Melanotan 1 75921 69 6 FM39599 Biosynth Tanning from the inside out = Highly Dangerous and Illegal! Many products advertised on social media platforms promising a tan from the inside out or a tan without sun such