Is Peptide Tanning Safe? Research & Facts Dubai Nasal tanners claim to work by using Melanotan II, a chemical that darkens skin pigmentation. It is illegal to sell medicinal products containing Melanotan II in the UK but since the tanners are sold Tanning from the inside out = Highly Dangerous and Illegal! Many products advertised on social media platforms promising a tan from the inside out or a tan without sun such Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn TanPlus Melanotan II 10mg Nasal Spray tan injectable: Convenient Alternative for Radiant Skin