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OPITAC is the only glutathione recognized with FDA GRAS status (GRN 293), offering a superior safety profile compared to synthetic glutathione, those produced using genetically modified microorganisms, or those derived from bread or brewer's yeast

However, data are scant and controversial, resulting in limited efforts to study the effect of nutritional interventions on GSH status

Sulfate supply influences compartment specific glutathione metabolism and confers enhanced resistance to Tobacco mosaic virus (TMV) during a hypersensitive response

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