Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Copper Peptides Ingredient Guide Nubeean Noosa GHK Cu Peptide Before and After Results 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 Biossance Squalane + Copper Peptide Rapid Plumping Serum