GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? Discover the origin of copper peptides, how they work, and why they've become a coveted addition to modern routines. Figure 3 from GHK Copper Peptide in Skin Remodeling and Anti Aging ! GHK Cu in Skin Remodeling Semantic Scholar GHK Cu Peptides: Unlocking the Copper Peptide Revolution in Skin Care GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not