The Risks Behind Tan Booster Injections & Nasal Sprays Melanotan Tanning Peptides: Safe Use, Side Effects & How It Works Scientifically White model Martina Big, who now a ''black' after taking tanning injections, announces plans to move to Africa. 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