Protein tyrosine phosphatase 1B in metabolic diseases and drug development Nature Reviews Endocrinology Stop Taking Melanotan II Dermatologist Breaks It Down Tanning, fake tan and Melanotan Cancer Research UK Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC News Love Island generation' skin cancer fear BBC News 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