SynthesisIranian journal of medical sciences2025
The Effects of Prebiotic Dietary Fibers, Probiotics, and Synbiotics on Gut Permeability and Immunity: A Systematic Review.
Synthesis in Iranian journal of medical sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
5 citing papers in PubMed.
- Natural Products as Nutritional Supplements in Human Disease Prevention and Management: From Molecular Mechanisms to Clinical Translation.Nutrients · 2026Review
- Review
- Short-Chain Fatty Acids: Bridging Gut Microbiota and Systemic Aging-Mechanisms, Interventions, and Current Challenges.Metabolites · 2026Review
- Dietary Fiber and Glucagon-Like Peptide-1 Receptor Agonists in Obesity Management: Converging Mechanisms, Interactions, and Strategies for Durable Weight Control.Advances in nutrition (Bethesda, Md.) · 2026Review
- Probiotics, postbiotics, and synbiotics in immune system modulation: A narrative review.Biotechnology notes (Amsterdam, Netherlands) · 2026Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Modulation of intestinal barrier, which function through zonulin pathway downregulation, represents a promising therapeutic strategy for chronic diseases. This systematic review aimed to evaluate the effects of prebiotic dietary fibers, probiotics, and synbiotics on intestinal permeability and immunity. Methods: A systematic literature search of the EMBASE, PubMed, Web of Science, and Scopus electronic databases was conducted from database inception up to May 2024, supplemented by manual reference list searches. Included studies met the following criteria: (a) English language publications; (b) clinical trials; (c) investigated each factor of serum or fecal zonulin levels, serum or fecal calprotectin, glucagon-likepeptide-2 (GLP-2), short chain fatty acids (SCFAs), long chain fatty acids (LCFAs), fecal bile acid (BA), LPS-binding protein (LBP), lipopolysaccharide (LPS), intestinal microbiota composition, or inflammatory factors such as interleukin 6 (IL-6) and high-sensitivity C-reactive protein (hs-CRP); (d) supplemented prebiotic dietary fibers, probiotics, or symbiotics. Studies were excluded if they contained insufficient data or involved supplementation alongside other interventions. The study quality and risk of bias were assessed using Jadad's Score. Results: A total of 36 studies were included in this review. Of these, 14 articles (n=580 participants) evaluated the effect of dietary prebiotics, 18 articles (n=1502 participants) evaluated the effect of probiotics, and six articles (n=517 participants) examined the effect of synbiotics on intestinal health and immunity markers. According to the evidence presented in this study, prebiotic whole foods or food enriched with prebiotics, probiotics, and synbiotics might have favorable effects on the serum levels of zonulin as a measure of intestinal permeability. The effects on GLP-2, gut microbiota, and their metabolites (e.g., LCFAs/SCFAs and BA) were contradictory and inconclusive. Some studies indicated increased levels of Conclusion: The lack of consistent replication across studies made it difficult to draw definitive conclusions about the effects of prebiotics, probiotics, and synbiotics on gut-related health and immunity. Therefore, further evidence is required before definitive recommendations can be established.
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Identifiers
What Socratic holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.