GHK Cu and Its Roles in Skin and Hair Transformation 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 A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend USA Copper Peptide GHK Cu Powder, DIY Blue Copper for Making the Best Face Cream eBay GHK CU GHKCu (glycyl L histidyl L lysine copper) is a naturally occurring copper peptide found in the human body, particularly in plasma, saliva, and urine. It plays a key role in skin regeneration by promoting