Melanotan II nasal spray: a possible risk factor for oral mucosal malignant melanoma? ScienceDirect Melanotan II an overview ScienceDirect Topics MK 0493 MC4R Agonist MedChemExpress 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 Absorption enhancement of melanotan l: comparison of the caco 2 and rat in situ< italic> models Melanotan is not a tan. It's an unregulated peptide with real risk. As a dermatologist, here's the reality: It has been linked to new and changing moles including cases of