GHK-Cu (Glycyl-L-Histidyl-L-Lysine-Cu²♠, CAS 49557-75-7) is a naturally occurring copper-binding tripeptide first isolated from human plasma in 1973. With over four decades of peer-reviewed publication it is among the most extensively characterised peptide compounds in biochemical literature — studied for extracellular matrix gene expression, fibroblast culture models, antioxidant enzyme pathways, and wound healing assays. RS Bio Labs supplies it at ≥99% HPLC-verified purity with a Certificate of Analysis on every order.
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