GHK Cu: The Peptide That Supports Healthy Aging GHK Cu (copper peptide) is naturally occurring in the body and plays a role in supporting skin health, collagen production, and tissue repair. As What is GHK Cu and Why is Everyone Talking About It? GHK Cu (Copper Peptide) is a powerful, naturally occurring compound in the body that plays a key role in skin health The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Oral Liposomal Copper GHK Liposomal GHK Cu Supplement GHK Cu Topical Cream GHK CU Program Calibrate Hydration