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[DOI] [PMC free article] [PubMed] [Google Scholar] 24.Shimabukuro-Vornhagen A, Gdel P, Subklewe M, Stemmler HJ, Schler HA, Schlaak M, et al

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Those with: Pigmentation or acne-prone skin Chronic stress or inflammatory conditions Poor liver function or frequent fatigue Exposure to pollution or smoking may especially benefit from glutathione-rich foods or supplementation

The copper ion is not merely a passenger in this complex it is integral to the peptide's biological activity, as GHK without copper shows significantly diminished effects in many assays

[DOI] [PubMed] [Google Scholar] 19.Crdoba-Tovar L., Barn P

Reduced Glutathione: Contains powerful antioxidant properties that combat oxidative stress and slow premature aging