GHK Cu Peptides: Unlocking the Copper Peptide Revolution in Skin Care GHK Cu (copper peptide) is a science backed anti aging compound that supports collagen production, skin regeneration, and overall skin health. Used in both topical serums and subcutaneous GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link Is GHK Cu Legal? FDA Approved Peptides Neurogan Health