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 Copper Peptide Benefits, Uses & Safety Intra V Sublingual GHK Cu TruHealth Physical Therapy GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? Amazon.com: GHK Cu Copper Peptide Supplement, Anti Aging & Hair Growth Support, Improves Skin Elasticity & Firmness, Thicker, Fuller Hair, Easy Absorption, Precisely Dosed, 90 Vegan Capsules : Health & Household