Melanotan II (Tan Jabs): Why They're Not Worth The Risk Melanotan 2 Nasal Spray A Z Guide 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 You Should Avoid Using Nasal Tanning Sprays Thinking about that tanning nasal spray? Don't. Unregulated nasal tanning sprays are being sold online, claiming to give you a sun kissed glow. But they're risky and illegal. According to the Chartered Trading