GHK Cu in the NAD+ Push Patch: A Smarter Way to Stimulate Collagen, He Hi, Finch 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 multiple biological processes involved in tissue repair, skin health, and An Exclusive Interview with Dr. Jimmy Gutman, World Renowned Expert on Glutathione TopDoctor Magazine Glutathione Precursors Tri Peptide Formula Glycine, Glutamine & NAC Enhanced with Na RALA, Biotin, Selenium, Molybdenum The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline