Melanotan II nasal spray: a possible risk factor for oral mucosal malignant melanoma? ScienceDirect Melanotan What It Is and Its Relation to Skin Cancer Melanotan II (Tan Jabs): Why They're Not Worth The Risk 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 Melanoma induction by ultraviolet A but not ultraviolet B radiation requires melanin pigment Nature Communications