Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Melanotan What It Is and Its Relation to Skin Cancer Melanocortins Protect against Diabetes Caused by Obesity Encyclopedia MDPI Melanotan II A Sun Kissed Look, and a Confident You. 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.