NFE2L2 and colorectal carcinoma: In this study, we identified sex-specific (A. muciniphila and L. murinus), CRC-specific (A. muciniphila, B. vulgatus, L. murinus, and M. intestinale), and Nrf2 KO-specific (B. vulgatus, L. murinus, and M. intestinale) taxonomic biomarkers.