Any testimonials after using the copper peptide serum?? GHK CU Copper Peptide, Face Serum, 1 oz (30 ml) GHK CU 50 mg LIVV GHK Cu Peptide Progress: Week 3 Results Oral Liposomal Copper GHK Liposomal GHK Cu Supplement 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK