New tanning trend you should never try Avoid nasal tanning sprays or nasal tanners entirely. These products promise an all over tan without sun exposure but they are unregulated, can be unsafe, and contain potentially risky substances like Melanotan 2. Is Melanotan II (Afamelanotide) nasal spray safe to use for tanning? 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 MELANOTAN II (MT 2) VIAL, (10MG) High Purity Peptide Pure Bio Labs