AHR and colitis: There were no significant differences in colon length, body weight change, DAI, and HAI between the KO (DSS + Pg) group and KO (DSS+Pg+LA) group (Fig. 7b–g, p > 0.05), showing that LA supplementation did not ameliorate the exacerbation of colitis mediated by Pg under AHR-deficient conditions.