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 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 Circadian Variation in Serum Free Ultrafiltrable Insulin Like Growth Factor I Concentrations in Healthy Children Pediatric Research Copper peptide GHK Cu Wikipedia Running in mice increases the expression of brain hemoglobin related genes interacting with the GH IGF 1 system Scientific Reports