In research settings, GHK-Cu is commonly explored in relation to cell signaling pathways, extracellular matrix interactions, and peptide-metal complex behavior
Most appear in preclinical PubMed studies, which doesnt make them approved for human use
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The exception from the linearly declining pattern of plasma levels was between 8.5 to 13 hours, when plasma levels were actually lower than at 24 hours
That alone is a major practical advantage