Absolute GHK cu Stem Cells & Peptide Hair Growth Serum and Shampoo MTS Mall of California Copper Peptides Serum for Face 2% GHK CU & 4% EGF 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 Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend