GHK Cu is a synthetic coppertripeptide complex composed of glycyl L histidyl L lysine (GHK) chelated with copper(II), used in research to study tissue remodeling, extracellular matrix regulation, and copper dependent signaling in vitro and in animal models
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These compounds sit in a gray zone: they are legal to sell and own for laboratory research, but they are not approved by the FDA for human use and are not dietary supplements
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Copper was still present, but the peptide had completely hydrolyzed into glycine, histidine, and lysine fragments with zero biological activity