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Plasma concentration of: (A) reduced glutathione (GSH) (μM), (B) oxidized glutathione (GSSG) (μM), (C) reductive power (dimensionless), (D) uric acid (mg/dL), (E) iron ions (mg/dL), and (F) thiobarbituric acid-reactive substances (TBARs) (μmol MDA.mg protein−1) in non-exercising (NPE) and exercising (PE) older women supplemented with L-glutamine or placebo for 30 days. * p < 0.05.
