Melanotan II Erectile Dysfunction Studies: What Early Research Shows and Practical Realities 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 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 as injectable PDF) Increasing illegal use of Melanotan: The Barbie drug hype Background Melanotan II (Tan Jabs): Why They're Not Worth The Risk