GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? Fraley Whats the difference between GHK Cu (copper peptide) as a topical cream vs an injection? In this video I break down: What GHK Cu is and why its used in anti aging skincare What results Struggling with hair thinning or shedding? Meet GHK Cu, the topical peptide everyone is talking about and NO, it's not an injection! This powerful serum helps: Reduce shedding Injectable vs Topical GHK CU: Which Copper Peptide Form Works Best? Sama Says