The concentrations of glutathione (GSH), catalase, superoxide dismutase (SOD), antioxidant capacity (TAC), 8-isoprostane and indoxyl sulfate in control (CON) rats and in rats treated with adenine (A) 50 mg/Kg, 100 mg/Kg, 50 mg/Kg + gum acacia (GA), 100 mg/Kg + GA. Each column is mean ± SEM (n=six rats). Statistical analysis by ANOVA followed by Tukey’s multiple comparison tests.