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This copper-bound state is believed to be the biologically active form studied in most published GHK-Cu literature, which is why GHK-Cu spray is formulated as the complexed peptide rather than the bare tripeptide
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B6 specifically supports the conversion of tryptophan to serotonin and the production of dopamine, making it directly relevant to the neurochemical mechanisms discussed earlier
10.1016/j.neuropharm.2011.07.018 28
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