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Study aim
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Effects of supplementation with a multi-species probiotic formulation (BioIBS®) on severity of symptoms and quality of life in patients with irritable bowel syndrome
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Design
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Parallel double-blind (both patients and researchers) randomized controlled clinical trial. Random assignment will be done by the use of computer generated random numbers. 60 patients with IBS of eligible in the study will be selected. Patients will be assigned to receive either probiotic supplements and placebo.
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Settings and conduct
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This study is performed on patients with IBS referred to the gastroenterology clinic of Ayatollah Taleghani Hospital.This randomized,double-blind, placebo-controlled trial will be performed among IBS patients.Patients will be randomly divided into two groups of 30 people (probiotic supplement and placebo). Fecal and blood samples will be collected from patients at the baseline and end of the study so that the sample population and the researchers are not aware of the capsules nature of each group.
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Participants/Inclusion and exclusion criteria
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Inclusion criteria: Ages range of 18-75 years, presence of Rome IV diagnostic criteria for IBS ؛ Hb < 10 g/dl. Exclusion criteria: surgical resection of the stomach,small intestine or large intestine,inflammatory bowel disease and ischemic colitis,infectious enteritis,hyperthyroidism or hypothyroidism,Pregnancy,used an over the counter or prescription laxative medication and probiotic or an antibiotic within 4 weeks prior to screening.
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Intervention groups
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probiotic capsule: containing L. rhamnosus, L. casei, L. acidophilus ؛placebo capsule: containing magnesium stearate and lactose
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Main outcome variables
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composition of the gut microbiota, blood biomarkers including cytokines (INF-γ, IL-6 and IL-10) and oxidative stress (Malondialdehyde (MDA) and total antioxidant capacity (TAC), severity of symptoms, improvement or worsening, and quality of life.