Blue Copper Peptide (GHK Cu) Guide: Anti Aging Science, Formulation & OEM Same GHK Cu. Better way. Same GHK Cu copper peptide complex. Completely different experience. If you've been eyeing the pen, put it down. We made something better, and your skin barrier will thank you Buffet" + Copper Peptides 1% The Ordinary Sephora 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