Melanotan II: Tanning injections, nasal sprays harmful to health Melanotan What It Is and Its Relation to Skin Cancer Don't risk your health for a summer glow! Tanning nasal sprays are creeping onto the UK market, particularly on online and lack of regulation means they are a significant risk to your 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, fake tan and Melanotan Cancer Research UK