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10.1111/j.1742-4658.2010.07644.x Grant CM, MacIver FH, Dawes IW: Glutathione is an essential metabolite required for resistance to oxidative stress in the yeast Saccharomyces cerevisiae
Lets get anecdotes! He follows this up with, I think this could be big and, I did my research
Sepesi B, Ye Y, Mitchell KG, Zhang L, Gu J, Ji L, Antonoff MB, Hofstetter WL, Rice DC, Mehran RJ, Walsh GL, Vaporciyan AA, Swisher SG , Roth JA, Wu X
Ascorbateglutathione pathway and stress tolerance in plants
Yet, as with any supplement, questions arise regarding its safety, especially concerning dosages like 1000 mg