Cellular Glow Copper Peptide GHK Cu Serum for Face 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 Ghk cu before and after 3 weeks : r BodyHackGuide Ghk Cu Experienxe : r Peptides A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Amazon.com: QUBIT GHK Cu Copper Peptide Face Cream 4% Peptides Moisturizer for Fine Lines, Wrinkles, Firming, Deep Hydration & Collagen 2400mg GHK Cu for All Skin Types, 30g : Beauty &