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Figure 3 Effects of oral glucose loading on plasma TBARS levels. There was a significant difference in the plasma TBARS levels among the three groups (p < 0.01 by ANOVA). DM: diabetes mellitus; IGT: impaired glucose tolerance; NGT: normal glucose tolerance; TBARS: thiobarbituric acid reactive substances. Data are expressed as mean ± SE. *p < 0.05, versus fasting; **p < 0.01, versus fasting; p < 0.05, versus 1 h.