CAT and inflammatory bowel disease: IBD significantly (p > 0.01, n = 6) increased catalase activity from 4.56 ± 0.84 (no IBD) to 11.15 ± 2.04, 9.67 ± 1.05 and 12.22 ± 1.95 nmol/min/10 mg tissue of mean colonic catalase activity on days 2, 4 and 7 of IBD, respectively.