Copper Peptides and Cell Interaction Research Studies Copper Peptide GHK Cu Gonadotropin releasing Hormone Agonist Skin Care Peptide Synthesis PNG GHK CU 100MG Simple Peptide Buy GHK Cu Copper Peptides Ireland Direct Peptides What is GHK Cu Collagen and Elastin Support Neurogan Health What is GHK Cu? GHK Cu (glycyl L histidyl L lysine copper complex) is a naturally occurring peptide in human plasma that: Binds copper ions Acts as a biological signalling molecule Plays a role