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This translates to approximately 1.6 to 4 mcg per kilogram of body weight, extrapolated from effective rat doses using standard interspecies scaling factors

this summary covers the well-studied copper tripeptide GHK-Cu (glycyl-L-histidyl-L-lysineCu)

This technical limitation hindered precise densitometric quantification, but we believe that the significant alterations in actual intracellular glutamine accumulation provide a compelling functional basis for our conclusions

GHK-Cu vs NAD+: Side-by-Side Comparison GHK-Cu vs NAD+: A Direct Clinical Comparison The full list of ghk-cu benefits becomes clearer in direct comparison