GHK Cu Peptides: Unlocking the Copper Peptide Revolution in Skin Care GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B 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 The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu Injections in Napa & Sonoma GHK Cu Copper Peptides: Topical vs Injectable