BPC 157 NAD+ GUK Cu Peptide Patch Medical Imaging and Therapeutics I've been getting a lot of questions about GHK Cu, so here's a quick breakdown. GHK Cu is a copper peptide that naturally occurs in the body and plays a role in skin repair 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 GHK Cu Cooper Peptide: The Complete Skin & Repair Guide (2026) GHK Cu Peptide: What It Does for Body Composition and Metabolic Health