Helloskin GHK Cu 1% Triple Peptide Regenerative Serum Amazon.com: GHK Cu Copper Peptides Serum for Face: Advanced Anti Aging Serum with Multi Peptide and Niacinamide for Fine Lines and Skin Elasticity : Beauty & Personal Care Copper Peptide (GHK Cu) 2% Recovery Serum 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 Not all copper peptide serums are formulated the same Before you buy one, make sure you're actually getting pure GHK Cu at the right concentration not just a diluted blend. We spent