What Are GHK Cu Peptides for Skin and Hair Health? Bounce Back Better with Peptides for Injury Recovery The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline 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 GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect