Melanotan is trending again. As a dermatologist, I strongly need to tell you It's an unapproved injectable peptide, and we're seeing: nausea and flushing darkening of existing moles Frontiers Activation of Melanocortin 4 Receptor Inhibits Both Neuroinflammation Induced by Early Exposure to Ethanol and Subsequent Voluntary Alcohol Intake in Adulthood in Animal Models: Is BDNF the Key Mediator? Professional Removal of Hyperpigmentation My London Skin Clinic Teen Boys and Young Men Are Injecting Peptides in Search of Perfection WSJ