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 This is a product I purchased on Amazon, so I want to give it a quick review. *~Dumie GHK CU Facial Serum~* This is a Copper Peptide serum that is working amazingly for Skin Restoration: Prioritizing Safety Over Trends GHK Cu Copper Peptide Benefits, Uses & Safety Intra V