GHK Cu Focal Point Vitality Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Jumbo Size The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline The Secret Your Skin Already Knows GHK Cu is not a random combination of letters. It is a naturally occurring copper peptide that helps your skin do what it already knows how Meet GHK Cu, the copper peptide that regenerates and protects. It helps stimulate collagen, improves skin quality, supports hair growth, and fights inflammation for healthier, stronger skin.,