GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy Biossance Squalane + Copper Peptide Rapid Plumping Serum GHK Cu Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Not all Copper Peptides are created equal If you've tried copper peptides before and saw no change, here is why: Concentration and Stability. Most serums use a diluted solution that barely scratches