IRCT20100524004010N27 IRCT 2018-12-13 Shahid Beheshti University of Medical Sciences Effect of Bacillus coagulans and inulin compared with low FODMAP diet in treatment of IBS The efficacy of synbiotic supplements containing Bacillus coagulans and inulin with low FODMAP diet compared with low FODMAP diet alone on inflammatory factors, clinical outcomes and quality of life in patients with irritable bowel syndrome 2017-09-22 anticipated 50 Complete https://irct.ir/trial/35679 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: The method use in this study to create a randomization process is simple randomization, so we utilize random number table. Beginning of the study, each person is randomly assigned to one of the 2 study groups according to the randomized distribution table. N/A Irritable Bowel Syndrom. Intervention 1: Intervention group: will receive one synbiotic capsule containing Bacillus coagulans(0.1) g and inulin(0.9 g) per day plus low FODMAP diet for 8 weeks. Intervention 2: Control group: will receive low FODMAP diet and placebo (starch) for 8 weeks. No - There is not a plan to make this available Justification or reason for not sharing IPD is Because the participant’s informations should remain confidental.