Wholesale GHK Cu Copper Peptide Neck & Face Serum for your store Faire GHK Cu Amazon.com: Neurogan GHK Cu (Copper Peptide) Neck & Face Serum 1,200mcg (1 oz bottle) : Beauty & Personal Care GHK Cu Copper Peptide Serum for Face Anti Wrinkle Increase Collagen Anti Aging Peptide Labz 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