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10.1186/1471-2164-11-73 BMC Genomics 34 JiW.ZhuY.LiY.YangL.ZhaoX.CaiH.et al (2010)

Cysteine contains a sulfhydryl group or thiol group

Similarities Between Glutathione and Other Antioxidants Protection Against Oxidative Damage Both Glutathione and traditional antioxidants neutralize the harmful effects of free radicals, preventing cellular damage and promoting long-term health

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Side Effects and Safety Concerns GHK-Cu safety depends on route, formulation, dose, product quality, population, and whether the use is cosmetic, clinical, compounded, or investigational [8], [11]

Erratum in: Nat Metab