Pyoderma Gangrenosum Secondary to Melanotan Cureus Reversing Gray Hair: Inspiring the Development of New Therapies Through Research on Hair Pigmentation and Repigmentation Progress PDGF injections are trending fast online, but many patients are not being told the full story including that most PDGF products were never FDA approved for injection into the face. We're now seeing No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky