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J chromatogr B Analyt Technol Biomed Life Sci 873:209217 Altar CA, Amakye D, Bounos D, Bloom J, Clack G, Dean R, Devanarayan V, Fu D, Furlong S, Hinman L, Girman C, Lathia C, Lesko L, Madani S, Mayne J, Meyer J, Raunig D, Sager P, Williams SA, Wong P, Zerba K (2008) A prototypical process for creating evidentiary standards for biomarkers and diagnostics

But obviously, there's a correlate there

Larger, randomized controlled trials (RCTs) with longer follow-up periods are necessary to evaluate the efficacy and safety of topical glutathione more robustly

In a study by Lin et al

Moreover, it promotes HSC apoptosis, reducing their number and ECM synthesis, thereby alleviating fibrosis