Melanotan II for Erectile Dysfunction: What the Evidence Shows and Practical Considerations Tanning from the inside out = Highly Dangerous and Illegal! Many products advertised on social media platforms promising a tan from the inside out or a tan without sun such 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 The Melanocortin System: A Promising Target for the Development of New Antidepressant Drugs Reminder of serious health risks with 'Melanotan 2' self tan products Irish Pharmacist