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 You Should Avoid Using Nasal Tanning Sprays Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report Illegal tanning nasal spray not a 'harmless alternative' to sunbaking, says TGA ABC News Melanotan II reverses memory impairment induced by a short term HF diet ScienceDirect