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 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 GHK CU Conversion of senescent cartilage into a pro chondrogenic microenvironment with antibody functionalized copper sulfate nanoparticles for efficient osteoarthritis therapy Journal of Nanobiotechnology Springer Nature Link