GHK Cu Copper Peptides: Topical vs Injectable GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu Copper Peptide Collagen Boost & Skin Regeneration Calibrate Hydration Defy GHK Cu (glycyl L histidyl L lysine) is a naturally occurring copper binding peptide found in human plasma. As levels decline with age, so may its support of the biological processes involved in collagen production, skin Struggling with hair thinning or shedding? Meet GHK Cu, the topical peptide everyone is talking about and NO, it's not an injection! This powerful serum helps: Reduce shedding GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B