Melanotan II Peptide for Skin Pigmentation You Should Avoid Using Nasal Tanning Sprays Not all self tanners are created equal. Emerging ingredients like melanotan, melanoidins, and other agents raise safety and concerns, according to the Journal of Drugs in Dermatology. If you have questions about the 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