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However, as people start to age or due to poor lifestyle choices, the levels of glutathione in the body start to decline

A 12-week trial in 71 women with photoaging showed measurable increases in skin density and thickness, reduced laxity, and improved fine line and wrinkle depth with GHK-Cu

Key Ingredients: Glutathione: A powerful antioxidant that helps to brighten the skin, reduce hyperpigmentation, and protect against environmental damage

[PMC free article: PMC419585] [PubMed: 15148384] 350

Screening was performed with a TGR assay using DTNB, including a 15 min preincubation of recombinant enzyme, inhibitor, and NADPH before addition of substrate (Table 3)