GHK Cu LVLUP Health GHK Cu Peptide Therapy in York & Hanover PA Body by Barker GHK CU Infiniwell 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 naturally occurring peptide GHK reverses age related fibrosis by modulating myofibroblast function He Aging Pathobiology and Therapeutics