Tanning Injections: Risks, Side Effects, and Precautions Melanotan II PERMANENTLY Darkened My Skin! AmphibiaWeb Rana clamitans Green Frog Ohio Department of Natural Resources Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn 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