SumaNurica GHK Cu Repairing Serum BRAND NEW, SEALED Restorative Skincare eBay GHK Cu Face Serum 1200MG Copper Peptide Tablets One of the questions we often receive about our products is: Why is the GHK Cu Repairing Serum stored in two part packaging? GHK Cu is an unstable ingredient that can slowly lose its effectiveness Your body doesn't guess it self corrects. The hypothalamus acts as the command center, constantly monitoring hormone levels and adjusting signals to keep the body in balance. When hormone levels rise, negative feedback 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 Travel Friendly Skincare Routine: Sumanurica Mini Set TikTok