Melanotan & Tanning Injections: Safe or Risky? Illegal tanning nasal spray not a 'harmless alternative' to sunbaking, says TGA ABC News Melanotan peptide might seem like the cool thing to doit makes you look tan., But these unregulated injections come with real risks., They can cause unpredictable skin changes, including darkening of Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn