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 Young Goose Blue Peptide Spray 50mg GHK Cu Vial Blue Copper Peptide Face Serum Age Aging Moisturizing Repairing for Skin Care Serum Facial Care Kit d HealthyDerm Copper Peptides GHK Cu Beef Tallow for Skin Blue Balm with Methylene Blue Manuka Honey Glutathione Index Test Food for the Brain Foundation