GHK CU 50mg Peptify Organic Copper Peptide Moisturizer Firming & Smoothing GHK Cu: The Peptide Everyone Is Injecting (Big Mistake?) GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes GHK Cu is often called the beauty peptide for a reason , Its a naturally occurring copper peptide associated with skin resilience, barrier support, and overall skin quality when used consistently.,