GHK Cu Glow Peptide Stack for Skin Rejuvenation Jennifer R. Berman MD Ghk Cu Peptides Hair Before And After Ghk cu before and after 3 weeks : r BodyHackGuide Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Copper Peptides Serum for Face 2% GHK CU & 4% EGF Seraphime 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