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Figure 3: Antioxidants diagram which descriptive statistics for quantitative biochemical data not distributed normally (median given as 25^{th}–75^{th} percentile). (a) The plasma glutathione reductase level was significantly lower in the methionine group than in the other groups (P < 0.001). (b) The plasma superoxide dismutase level was significantly lower in the methionine group than in the other groups (P = 0.001) 
