Revitalize Your Skin: The Benefits of Copper Peptide for Youthful Glow The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu is a copper peptide used in regenerative medicine to support collagen production, tissue repair, and cellular renewal throughout the body. It's for individuals looking to improve skin firmness, brightness, and visible Parents & teen athletes: not everything trending on social media is safe., Copper peptides like GHK Cu are being promoted for skin health, but these products are unregulated and not FDA approved,