5 alpha Reductase Inhibitors, Agonists and Modulators BOC Sciences Copper Peptides for Hair: Do They Really Work? Amino Innovations Ingredients Hairgenetix GHK Cu, AHK Cu & PDRN Peptides How GHK Peptide Works Signaling GHK acts as a switch for skin repair: Interacts with adenosine receptors reduces inflammation Activates MAPK ERK, PI3K Akt, TGF pathways Stimulates fibroblasts & keratinocytes boosts collagen, elastin Ingredients Hairgenetix GHK Cu, AHK Cu & PDRN Peptides GHK Cu 50mg NewBioRx