Full article: Enzymatic cross linking of collagens in organ fibrosis resolution and assessment JCI 11 Hydroxysteroid dehydrogenase blockade prevents age induced skin structure and function defects Human lysyl oxidase like 2 ScienceDirect Modulation of Fibroblast Phenotype and Collagen Synthesis by GHK Cu in Prime Lab 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