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 longer lasting than Melanotan II in Santa Barbara, CA Eternity Health Partners Melanotan II nasal spray: a possible risk factor for oral mucosal malignant melanoma? International Journal of Oral and Maxillofacial Surgery A peptide that makes you tan. Sounds great. What could go wrong? When its activating your melanocytes to increase pigment in your skin, it may also be causing cancer melanoma. Ive had patients have