A peptide that makes you tan. Sounds great. What could go wrong? When its activating your melanocytes to increase pigment in your skin, it may also be causing cancer melanoma. Ive had patients have FDA Fast Facts Melanotan 2 Reviews, Clinical Trials, and Safety Illegal tanning nasal spray not a 'harmless alternative' to sunbaking, says TGA ABC News 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