Is this injectable tanning drug safe to use? 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 Sharing my personal experience with Melanotan tanning injections (now nasals) how vanity led me down the path of using it, thinking I'd done all my research. Now, years later, I'm dealing with The Hidden Dangers of Tanning Nasal Sprays That You Should Be Aware Of