Melanotan What It Is and Its Relation to Skin Cancer Think twice before injecting peptides bought online: unauthorized products can seriously harm you Canada.ca 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 No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky