Figure 6 Effect of 1.4‐dihydroxy‐2‐naphthoic acid (DHNA) administration on colonic intraluminal pH in dextran sodium sulphate (DSS) induced colitis. pH was determined by a pH meter in caecal contents. *p<0.05 versus normal controls, †p<0.05 versus DSS treated controls. DW, distilled water. Results are expressed as means (SEM) (n = 10).