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armpearl on 09 Jul 25What Are Copper Peptides? Copper Peptides are small, natural occurring proteins fragments that are bound to copper ions. In skincare, the common form of it is GHK-Cu (Glycyl-L-Histidyl-L-Lysine-Copper). This compound is found in small traces in the human body that play a vital role in wound healing, tissue repair and collagen synthesis to maintain skin elasticity.