method for determination of reduced and oxidized glutathione glutathione disulfide using liquid chromatography: A review on recent applications Oxidation-reduction pathway of reduced glutathione
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There has been no known untoward side effects from taking Glutathione supplements

doi:10.1001/archneur.1989.00520460115022, 52

Table 1 A model of diverse roles of plant GSTs in four different interaction types between plant hosts and pathogenic microbes

They observed a direct correlation between the levels of carbonyl moieties, an indicator of protein oxidation, and the severity of the lesion