MELANOTAN II HGH & Peptides Deus Medical Melanotan 2 Complete Guide and Safety Information Meet Melanotan II (aka Melanin 2) Peptide Think of this peptide as your sun kissed secret weapon. Melanotan II works by gently stimulating your body's natural melanin productionthe pigment that gives 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