AHR and colitis: Berberine (Jing et al., 2021), Shenling Baizhu San (Lv et al., 2022), Gegen Qinlian decoction (GQD) (Wang et al., 2023), and baicalein (Li et al., 2022) can greatly prevent the intestinal barrier and inflammation in the animal colitis model induced by DSS by regulating the AHR–microbiota axis.