Copper Peptides (GHK Cu): What They Are, How They Work, and What Evidence Really Shows VIDA Integrative Medicine GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration One of my favorite peptides is GHK Cu. It has made such a dramatic impact on my skin in just one cycle I've been shocked! It supports collagen, healing, and overall skin AHK CU vs. GHK CU Differences, Benefits & Which Copper Peptide Is Best for Hair Growth Neurogan Health