Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC News Melanotan II (Tan Jabs): Why They're Not Worth The Risk Melanotan is not a tan. It's an unregulated peptide with real risk. As a dermatologist, here's the reality: It has been linked to new and changing moles including cases of Melanotan Nasal Spray Side Effects and Dangers PDF) Use of melanotan I and II in the general population