GHK Cu (copper peptide) is a science backed anti aging compound that supports collagen production, skin regeneration, and overall skin health. Used in both topical serums and subcutaneous 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 GHK Cu Hyaluronic Acid Gel Wells Pharmacy Network