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 It doesn't take much to fall down the Barbie Drug rabbit hole. In self tanner subreddits and on TikTok Shop, the tanning injectionaka Melanotan IIis marketed as a self tanner alternative that works by Melanotan II Results (With Before And After Pictures) The Tanning Drug Melanotan II Skin Pigmentation & Libido melanotan II C50H69N15O9 CID 92432 PubChem