Melanoma induction by ultraviolet A but not ultraviolet B radiation requires melanin pigment Nature Communications 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 Figure 4 from Changes of melanocytic lesions inducedby Melanotan injections and sun bed use ina teenage patient with FAMMM syndrome Semantic Scholar An overview of benefits and risks of chronic melanocortin1 receptor activation Bhm 2025 Journal of the European Academy of Dermatology and Venereology Wiley Online Library