Melanotan II (Tan Jabs): Why They're Not Worth The Risk A Current Affair: Tanning 'Barbie drug' a danger to users, experts say Melanotan What It Is and Its Relation to Skin Cancer 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 II: Tanning, Sexual Health Benefits, & Safety Concerns