Every time you exercise your body generates oxidative stress as a natural byproduct of muscle contraction and energy production. At moderate levels that is a healthy signal. But when exercise intensity exceeds The Influence of Intracellular Glutathione Levels on the Induction of Nrf2 Mediated Gene Expression by Dicarbonyl Precursors of Advanced Glycation End Products Characterisation of Glutathione Export from Human Donor Lenses Liposomal glutathione outperforms plain glutathione in uptake, cell regeneration and systemic availability: evidence from cellular and human models British Journal of Nutrition Cambridge Core