High-protein diets increase microbiota associated p-cresol production in the colon and reduce gut barrier function in a sex-dependent manner. - James, Daniel; Batool, Maria; Poveda, Carlos; Hayirli, Zeynep; Callow, Chloe; Abbas, Munawar; Linden, Brandon; Gibson, John; Griffin, Bruce A.; Elmore, J. Stephen; Walton, Gemma E.; Robertson, M. Denise; et al. (European Journal of Nutrition, 2026)