You Should Avoid Using Nasal Tanning Sprays Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn 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 Melanotan II: Tanning, Sexual Health Benefits, & Safety Concerns Nasal tanning sprays linked to skin cancer, trading standards officers warn Consumer affairs The Guardian