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In a randomised controlled trial published in the European Journal of Nutrition in 2014, Setria glutathione supplementation demonstrated significant increases in glutathione levels showing a 30% rise in whole blood, a 35% increase in red blood cells and a 260% increase in buccal cells

2012 Jul 10;2(7):e134

Baer et al., 2002

Depletion of GSH (by BSO or diethylmaleate) also inhibits macrophage leishmanicidal activity, as well as NO production, while the GSH precursor GSH-ethyl ester restores them, 79 suggesting that the requirement for the GSH/NO pathway might be a common feature of resistance to intracellular pathogens