Melanotic macule of nail unit and its clinicopathologic spectrum ScienceDirect Figure 2 from Oral pigmentation Semantic Scholar Melanotan & Tanning Injections: Safe or Risky? 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.