Biossance Squalane + Copper Peptide Rapid Plumping Serum 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 Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. Westend Medical Supply Blue Copper Peptide (GHK Cu) Guide: Anti Aging Science, Formulation & OEM GHK CU 50mg Vial Copper Peptide Pure Bio Labs Repair Sun Damaged Skin with Vitali's GHK Cu Copper Peptides Vitali Skincare