Injecting peptides you bought online? 'Think twice,' Health Canada warns National Globalnews.ca At a glance: Newly reported psychoactive substances in Canada 2020 2021 Canada.ca MT 2 (Melanotan II) Polar Peptides 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 HEALTH CANADA WARNING: POTENTIALLY FATAL Recreational Use of Nitrous Oxide Health Canada warns consumers not to inhale nitrous oxide, also known as laughing gas, recreationally. Sold in retail stores in Canada as