Copper Peptide Serum for Dull & Mature Skin VALNCIA Copper Peptide (GHK Cu) 2% Recovery Serum GHK Cu Copper Peptide Hair Tonic for Fuller Looking Hair 12 Week Supply (30 mL) GHK Copper Peptide Concentrate, cumpr ingredient cosmetic Skin, But Smarter Three main ingredients. Real results: GHK Cu the repair peptide that boosts collagen, smooths texture, and restores skin from within. Argireline the wrinkle softening peptide that helps relax