Melanotan II Safety: Tanning Injection LIVV Natural Nasal tanning sprays linked to skin cancer, trading standards officers warn Consumer affairs The Guardian 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 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 The Dark Side of Melanotan Tanning Injections: My Personal Experience Revealed Man warns against 'dangerous' tanning injections after turning so dark he 'looked like Madge from Benidorm' and now has the freckled skin of a 60 year old