Dangerous' tanning products promoted by influencers 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 II Uncovered Your Essential Guide to Tanning, Libido Enhancement, and Smart Peptide Protocols: Proven Methods to Inject Safely, Monitor Health expert says Melanotan II darkens skin moles and can make melanoma hard to detect Herald Sun Don't risk using tanning products containing melanotan Therapeutic Goods Administration (TGA)