This randomized, double-blind, placebo-controlled trial titled "Randomised placebo-controlled trial of dietary glutamine supplements for postinfectious irritable bowel syndrome" (PMID: 30108163), published in Gut, evaluated the efficacy of oral glutamine in patients with postinfectious diarrhea-predominant irritable bowel syndrome (IBS-D) and increased intestinal permeability. The study demonstrated that glutamine supplementation significantly improved
