GHK CU 30ml by InfiniWell 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, InstaMed GHK Cu Sublingual Oral Strips 20ct ePothex 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