GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or Amazon.com: The Ordinary Multi Peptide + Copper Peptides 1%, GHK Cu Anti Aging Serum for Fine Lines and Skin Elasticity, 1 Fl Oz : Beauty & Personal Care Blueprint Haircare Stack: Product Review Let's take a short break from K beauty and revisit an OG skincare ingredient that has decades of research behind it: Copper peptides. One serum that highlights this ingredient beautifully is the @deciem