GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect Glow from within GHK Cu is one of the most powerful regenerative peptides for skin, hair, and total tissue health Think: boosted collagen, enhanced healing, and real, visible rejuvenation over time. G H K the beauty peptide everyone's talking about If you're serious about skin health from the inside out, GHK (glycyl L histidyl L lysine) is one to know. Naturally found in the body, GHK Cu Copper Peptide Benefits, Uses & Safety Intra V