Cu Peptide Before and After: What to Expect for Skin and Hair 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 GHK Cu Peptide Progress: Week 3 Results AHK CU + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan Ghk Cu Vs Finasteride 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care Seraphime