GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link OBM Geriatrics The Effect of the Human Plasma Molecule GHK Cu on Stem Cell Actions and Expression of Relevant Genes Golgi targeted copper delivery strategy via enhancing copper dependent proteins' activity for fascia regeneration ScienceDirect PDF) GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration GHK CU Apollo Peptide Sciences GHK Cu Peptides: Unlocking the Copper Peptide Revolution in Skin Care