GHK CU Peptide for Skin Rejuvenation Wittmer Rejuvenation Clinic Copper uglies = temporary. When you start GHK Cu, you can get a spike in free copper breakouts, texture, irritation. It's not the peptide failing. It's your body adjusting. Happens fast GHK Cu Facial Serum Premium Health Care Pharmacy GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes