The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Copper Peptide (GHK Cu): Clinical Uses, Stability & Compounding Tips Lets talk about GHK Cu beyond the marketing., Copper peptides are often positioned as anti inflammatory and universally regenerative., And in many patients, they are., But biology is not linear., GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes