Moreover, IDA derived from Peptostreptococcus anaerobius has been reported to transcriptionally upregulate the expression of aldehyde dehydrogenase 1 family member A3 (ALDH1A3) in an AhR‐dependent manner, contributing to the malignant progression of CRC by inhibiting ferroptosis.59 Here, AHR is linked to colorectal carcinoma.