Tanning Peptides: Yay or Nay? Nasal sprays containing the 'Barbie Drug' melanotan are very, very dangerous and completely unregulated, according to leading dermatologist. Experts say there has been a surge in the use of the illegal tanning aid Fitness influencers promote risky, unproven fitness products called peptides online and health experts are ringing alarm bells Capital Current Melanotan What It Is and Its Relation to Skin Cancer