GHK Cu Peptide: What It Does for Body Composition and Metabolic Health Ever heard of GHK Cu peptide? It's a naturally occurring copper peptide that helps repair tissue, stimulate collagen, and support skin healing. When used in injectable form, it works at a deeper level Peptide GHK CU Cream Concierge MD GHK Cu Glow Peptide Stack for Skin Rejuvenation Jennifer R. Berman MD Copper peptide GHK Cu Wikipedia