GHK Cu Copper Peptide Neck & Face Serum Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Copper Peptides for Skin Health The Great Address Super GHK Copper Lets talk copper peptides , We get asked this all the time:, Whats the difference between GHK and CP Serum?, Heres your quick guide:, GHK (first generation), Beautiful blue serum, Best for