Z. Rezaei and F. Sadri, “The Tryptophan–AhR Circuit in the Gut: Microbial Indoles, Kynurenines, Serotonin, and Therapeutic Opportunities in Inflammatory Bowel Disease__A Comprehensive Review”, J DIGEST BIOMOL THER, vol. 1, no. 1, pp. 9–24, Dec. 2025, Accessed: Feb. 24, 2026. [Online]. Available: https://jdbt.eternopublisher.com/index.php/jdbt/article/view/7