You Should Avoid Using Nasal Tanning Sprays 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 Emerging Threat: Melanotan, Repackaging, and Online Sales The Hidden Dangers of Tanning Nasal Sprays That You Should Be Aware Of 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 as injectable