Unauthorized injectable peptides and their potential serious health risks College of Physicians & Surgeons of Alberta CPSA 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 Nasal tanners left me suffocating in hospital' Unauthorized injectable peptide drugs seized and sold by Canada Peptide may pose serious health risks Canada.ca Injectable tanning drug raising concerns in B.C. CBC News