Copper peptides explained what are the differences between copper peptides and GHK CU peptides? What they actually do for the skin in terms of repair and collagen, and what you can and cant mix Copper Peptides vs Retinol: Do You Need Both? Nubeean Noosa Revitalize Your Skin: The Benefits of Copper Peptide for Youthful Glow Some people notice their skin looks worse before it improves with GHK Cu. This temporary phase is often called the copper uglies., #skincare, #ghkcu, #skinhealth, #longevity, #peptides