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 is one of the most powerful regenerative peptides for skin, hair, and overall tissue health. GHK Cu supports collagen production, healing, and visible rejuvenation from within. It's commonly used to improve skin GHK Cu Peptide: Benefits for Tissue Repair, Healing, and Recovery Revolution Health & Wellness 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper