Cu Peptide Before and After: What to Expect for Skin and Hair GHK CU Before and After Pictures Topical GHK Cu Skin Results, Face Serum Reviews & Photo Results Neurogan Health GHK Cu, Copper Peptide Powder, 99% min, 1 gram, CAS 89030 95 5 Albochemicals Lab and Science Supplies 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