Nasal tanning sprays warning issued by Trading Standards Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and Say No to Nasal Tanning Sprays Dermatology Times Avoid nasal tanning sprays or nasal tanners entirely. These products promise an all over tan without sun exposure but they are unregulated, can be unsafe, and contain potentially risky substances like Melanotan 2. Nasal tanning sprays linked to skin cancer, trading standards officers warn Consumer affairs The Guardian