GHK Cu is getting a lot of attention right now, and for good reason. This is not just a skin peptide. It's a copper binding tripeptide with documented effects on gene expression, collagen synthesis, The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline 6 month GHK CU check in Main takeaway: skin transformation takes time. GHK CU peptide binds to copper and activates genes involved in wound healing, collagen synthesis, and skin remodeling. On the face, this translates GHK Cu: Skin Healing, Anti Aging, & Hair Growth Benefits