Parameters of liver oxidative stress in mice fed a control diet (CD30) or a Western-style diet (WD30) for 30 weeks. (a) Liver reduced glutathione (GSH) level. (b) Liver malondialdehyde (MDA) level. (c) Production of reactive oxygen species (ROS) in liver homogenate measured as fluorescence changes in dichlorofluorescein. LEAK, measurements in the absence of ADP; OXPHOS, measurements in the presence of ADP (2.5 mM); NADH-linked substrates (pyruvate, 5 mM; glutamate, 10 mM; malate, 2 mM); S (succinate, 10 mM); capacity (NADH-linked substrates + succinate + octanoylcarnitine, 0.5 mM + glycerophosphate, 10 mM); β-oxidation (octanoylcarnitine + malate). Results are expressed as the means ± SD (n = 6 each group).