White model Martina Big, who now a ''black' after taking tanning injections, announces plans to move to Africa. What exactly is Melanotan and how does the tanning solution work? 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 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