Ghk Cu Serum Peptides Intensive Serum Tripeptide 1 Ghk Cu Copper Peptide Acetyl Hexapeptide 8 Intensive Repair Reduces Wrinkle G Peptide Labz Copper Peptide Hair Growth Serum, 10% GHK cu, 5% AHK cu, Rejuvenates Follicles Walmart.com The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu is a regenerative peptide studied for its role in collagen support, tissue repair and inflammatory balance. As natural levels decline with age, interest in its broader biological impact continues to grow