GHK Cu Copper Peptide in LA 3,356+ Reviews Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 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 Customizable Logo Blue Copper Peptide Essence Ghk Cu Glow Peptide Serum Anti Aging Repair Moisturizing Shrink Pores Skin Care G Ghk Cu Glow Advanced Peptide Serum and Blue Copper Peptide Anti Aging Serum price Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference