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Additionally, GHK-Cu performs best at a physiological pH of 7.4

10.1016/S1474-4422(25)00026-2 131 MoradiG.ZinadiniS.RajabiL.Ashraf DerakhshanA

Cysteine can be assimilated through different pathways depending on the needs of the cells, giving rise to sulfur compounds [6,7]

J Neurocytol 22:893902 Ong WY, Garey LJ, Leong SK, Reynolds R (1995) Localization of glial fibrillary acidic protein and glutamine synthetase in the human cerebral cortex and subcortical white mattera double immunolabelling and electron microscopic study

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By bypassing the harsh stomach environment, more intact peptide molecules theoretically survive to reach absorptive tissues