Buy Melanotan II for Erectile Dysfunction: What to Know Before Considering It Melanotan What It Is and Its Relation to Skin Cancer 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 What It Is and Its Relation to Skin Cancer 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.