GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes 7% GHK CU ACCELERANT Platinum Skin Care Dimeric copper peptide incorporated hydrogel for promoting diabetic wound healing Nature Communications Skin Restoration: Prioritizing Safety Over Trends