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 In a major policy shift, the U.S. Food and Drug Administration is reconsidering restrictions on several controversial peptides, including trending compounds like BPC 157 and Melanotan II. The move comes as demand for Melanotan Peptides: Science Behind Skin Darkening And Their Biological Mechanisms Age Well ATL Buy Melanotan II for Erectile Dysfunction: What Health Conscious Men Need to Know Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report