The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu is a naturally occurring copper peptide found in the body that plays a key role in skin regeneration, healing, and overall skin health. As we age, levels declinewhich is where topical GHK Cu Peptide Therapy Topical Cream BHive Management 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper