GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? GHK Cu Side Effects, Complications, and Risk Profile GHK Cu Copper Peptide Scalp Therapy Oral Liposomal Copper GHK Liposomal GHK Cu Supplement GHK Cu Peptide Skin Cream Levers.Health A year ago I started working with a copper peptide called GHK Cu. Topically every night. And under my doctor's care, I went deeper than topicals with a low dose. The difference in