Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Jumbo Size Ghk cu Peptide Face Serum NEW Cobalt Blue Bottle 2 Oz Etsy 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK 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 Buy GHK Cu Copper Peptides (100MG) Shop 99% Pure Peptides