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 Martina Big, 36, who is from Germany, and her husband Michael Eurwen, 38, who both injected Melanotan, a synthetic hormone to darken their skin have announced that they are planning to permanently Nasal tanning sprays linked to skin cancer, trading standards officers warn Consumer affairs The Guardian Melanotan 1 (10 MG) Sigma Compounds Melanotan II Safety: Tanning Injection LIVV Natural Nasal tanning sprays linked to skin cancer, trading standards officers warn Consumer affairs The Guardian