5 alpha Reductase Inhibitors, Agonists and Modulators BOC Sciences Caffeic acid N [3,5 bis(trifluoromethyl)phenyl] amide as a non steroidal inhibitor for steroid 5 reductase type 1 using a human keratinocyte cell based assay and molecular dynamics Scientific Reports GHK Cu 50 mg Copper Peptide Research Grade PRG The Advancement of Herbal Based Nanomedicine for Hair 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 Inhibition of type 1 and type 2 5 reductase activity by free fatty acids, active ingredients of Permixon ScienceDirect