Tanning Injections: Risks, Side Effects, and Precautions 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 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 Injections The Low Down Lynton Lasers Dangerous' tanning products promoted by influencers