GHK Cu Peptide: Mechanism, Anti Aging Research, and Regenerative Benefits GHK Cu Peptide Hormone Replacement Therapy Los Angeles Essential GHK Cu Serum: What It Is, How It Works, and Why It Matters f Bacteriostaticwater.com Defy 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 The potential of GHK as an anti aging peptide