Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, GHK Cu, commonly known as copper peptides, are found naturally within the human body where they play a vital role in skin repair and maintenance. Copper peptides support optimal skin function by helping Amazon.com: InfiniWell GHK CU Peptide Serum Anti Aging Serum for Face, with Copper Peptide Complex Visibly Smooth Fine Lines & Encourage Healthy Skin Hydration Promote Collagen & Elastin Production (30