GHK Cu, commonly known as copper peptides, are found naturally within the human body where they play a vital role in skin repair and maintenance. Copper peptides support optimal skin function by helping Best Copper Peptide Serum The top 4 options of 2026 GHK Cu is a naturally occurring copper binding peptide that plays a major role in tissue repair and remodeling, with a strong focus in research on skin and hair biology. It works by signaling GHK Cu Copper Peptide Injections: Advanced Skin Rejuvenation GHK Cu 100MG NuRev Peptides