Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Figure 4 from Changes of melanocytic lesions inducedby Melanotan injections and sun bed use ina teenage patient with FAMMM syndrome Semantic Scholar Melanotan is not a tan. It's an unregulated peptide with real risk. As a dermatologist, here's the reality: It has been linked to new and changing moles including cases of Rise in use of 'dangerous' tanning injection Channel 4 News