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 GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia Peptide Therapy in NYC & Long Island Perfect Med Spa Have you used peptides? What are your thoughts? Let me know below Peptides are short chains of amino acids that play vital roles in cellular signaling and repair throughout the body. How Often to Inject GHK Cu PeptidesExplorer