Melanotan Tanning Peptides: Safe Use, Side Effects & How It Works Scientifically MD breaking down Melanotan II Part 2 of my peptide series. The research, the risks, the reality. Long term safety data? Nonexistent. 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. Melanotan II Wikipedia Stay Sun Kissed All Year Round with Melanotan 2 Melanotan is a tanning peptide that stimulates the production of melanin in the body to foster a deep, natural tan. This is the