R 10% Ghk Cu + 5% Ahk Cu Copper Peptide Hair Density Serum Blue is the color of our Blue Copper Peptide Serum Complex of 3% , #ghk #copperpeptide #serum #skincare #valenciacosmetica The difference between our Copper Peptides and GHK Cu GHK Cu is one specific copper peptide molecule great for signaling repair and collagen support. Our Copper Peptide formula goes beyond just 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