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Natural Ageing: As we get older, our bodies naturally become less efficient at synthesizing glutathione

Reported Limitations and Considerations in GHK-Cu Research Gaps in the Current Evidence Base Despite a substantial pre-clinical record, GHK-Cu lacks large-scale human clinical trial data for most reported applications

GHK-Cu peptide apparently binds to ferritins iron-release channels, physically blocking Fe(II) efflux into surrounding media

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And you can take glutathione-boosting supplements