Melanotan II A Sun Kissed Look, and a Confident You. Clinically important side effects of Melanotan II and placebo Download Table 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 Melanotan Tanning Peptides: Safe Use, Side Effects & How It Works Scientifically Use Melanotan 2 Nasal Spray for Better Tanning Effects by Megatan uk Infogram