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 Buy Melanotan II for Erectile Dysfunction: What the Evidence Shows and Practical Considerations Melanotan 2 Vials: Premium Tanning Peptide for Glow Melanotan II Safety: Tanning Injection LIVV Natural To tan or not to tan Atlantic Dermatology & Laser 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.