GHK Cu (glycyl L histidyl L lysine) is a naturally occurring copper binding peptide found in human plasma. As levels decline with age, so may its support of the biological processes involved in collagen production, skin repair, and GHK Cu Copper Peptide Neck & Face Serum GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration Advanced skincare, elevated Now available: Facial Beauty Serum with Copper Peptide (GHK Cu) by Quicksilver Scientific This elegant topical serum features cosmetic grade copper peptide to support smoother, more radiant looking skin and overall