Melanotan II A Sun Kissed Look, and a Confident You. 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 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 2 (10ml 20mg) peptide to stimulate melanin synthesis.