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A high chromatographic purity result does not automatically prove: That the main peak has the correct GHK sequence That the expected amount of copper is present That the correct copper-peptide complex has formed That unbound copper is absent That the container holds the stated net amount That the material remained stable during storage That a finished cosmetic complies with UK safety requirements That the material is suitable for administration For a copper peptide, peptide purity and copper characterisation answer different questions

~ AlphaMD When it comes to understanding hormone healthespecially testosteronetwo terms often come up: free testosterone and total testosterone

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