GHK Cu Copper Peptide: The Ultimate Peptide For Longevity Viral claim says GHK Cu reset nearly 4,000 genes to a younger state and increased collagen production in a preclinical study. This refers to research on GHK Cu, a naturally occurring copper binding peptide that No, were not actually injecting copper , GHK Cu is a peptide your body already makes (just less of it as you age). It binds to copper and helps signal repair., Why people are into it:, supports Copper peptides: What are they and what do they do for skin?