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GHK-Cu (Copper peptide) is a signal peptide naturally found in human blood plasma, composed of glycine, histidine, and lysine complexed with copper ions. As a breakthrough ingredient in cell repair, it has become one of the core active ingredients in high-end skincare and bio-repair applications due to its exceptional regenerative and repairing capabilities and multiple anti-aging effects.link:http://www.lymallpanda.com