Risks of Melanotan: TGA to issue fresh warning against 'Barbie drug' The Australian 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 What's the difference between freckles, sunspots and moles? Freckles, Dark Spots, Moles, Birthmarks: What's the Difference? CV Skinlabs Freckles Tirath Ram Shah Hospital