CAT and acquired angioedema: On day 42, compared with the control group, the AAE groups with the values of 1.0 and 1.5 g/kg tended to increase the duodenal CAT activity (p < 0.10); however, SOD activity in duodenum of AAE groups with the values of 1.0–2.0 g/kg, jejunum of AAE groups with the values of 1.0 and 1.5 g/kg, and ileum of AAE groups with the values of 1.5 and 2.0 g/kg was increased (p < 0.10, p < 0.05, p < 0.01).