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 Think twice before injecting peptides bought online: unauthorized products can seriously harm you Canada.ca How Melanotan Peptides Work to Enhance Skin Tone and Promote Tanning Age Well ATL That quick tan injection is NOT worth the risk., Melanotan peptide injections stimulate pigment cells, and its use has been linked to rapid changes in moles, including the potentially fatal skin No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky