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 Copper Peptide 10 GHK Cu 5 AHK Cu Hair Growth Serum GHK Cu before and after : r Biohackers Real people. Real results. No hype. We didn't ask Stephanie to do anything special. No ring light, no filter, no professional photos. Just her bathroom mirror and 3 weeks of consistency.