Evidence Intelligence™
- EvidenceScore™
- 73
- Moderate
- ImpactScore™
- 68
- Positive
- ConsistencyScore™
- 100
- consistent
Supporting studies: Based on 3 studies
Add to Evidence TrackerType 2 Diabetes (T2D)Nutrition & DietSupplements and Vitamins
Research Summary
Analyzed using Evidence Intelligence™
Gut microbiota interventions may improve glucose and cardiometabolic markers in type 2 diabetes
Last updated May 26, 2026
Key finding
This systematic review found that microbiota-directed strategies, including probiotics, personalized nutrition, and diet changes, were often linked with better glycemic and cardiometabolic markers, but study methods and results varied across trials.
This paper reviewed 10 intervention studies on gut microbiota-directed approaches in type 2 diabetes and related metabolic risk groups. Many studies reported better HbA1c, insulin sensitivity, lipids, or inflammation, but effects were not fully consistent. Because trials differed in design, duration, and populations, the overall evidence is promising but still uncertain.
Quick read
Study at a glance
The essential study design details in one scan.
EvidenceScore™
Low
Study type
Systematic Review
Follow-up
Medium-Term (3–12 mo)
Risk of bias
Some Concerns
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Plain-language summary
What this paper says
A plain-language read of the study’s main message and where it applies.
Study focus
This systematic review found that microbiota-directed strategies, including probiotics, personalized nutrition, and diet changes, were often linked with better glycemic and cardiometabolic markers, but study methods and results varied across trials.
Published in
Journal Reference
Publication details and source links for this paper.
Ur Rehman M, Saeed H, Omer O, Tashfeen S. Gut Microbiota-Directed Interventions in Type 2 Diabetes: A Systematic Review of Clinical Outcomes and Complication Risk. Cureus. 2025;17(10):e95045. doi:10.7759/cureus.95045
Main Effects
HbA1c ↓ in several included intervention trials
Insulin resistance ↓ in multiple microbiota-targeted strategies
Cardiometabolic markers (lipids, blood pressure, CRP) often improved
Evidence network
How this study fits
Understand where this research contributes within the broader evidence network.
Evidence Context
This study contributes evidence to Probiotics and HbA1c, Insulin resistance, LDL cholesterol.
This study contributes evidence to
Primary intervention
Probiotics
Primary outcomes
- HbA1c
- Insulin resistance
- LDL cholesterol
Primary intervention
Primary outcomes
Evidence relationships
Intervention and outcome relationships this study adds to the evidence network.
3
Evidence pairs
3
Relationships
3
Evidence topics
contributes_evidence
Editorial context
Why this study matters
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Evidence network role
This section describes how the study fits into the current evidence network. It does not determine whether an intervention works on its own.
Limited contributionModerate confidenceNetwork score: 42
3
Related topics
3
Evidence pairs
466
Related studies
High relevance in at least one topic
Why it is useful
- Contributes to 3 evidence relationships
- Linked to 3 direct semantic evidence topics
Topic contributions
Evidence topic
Contributes evidence
Evidence topic
Contributes evidence
Evidence topic
Contributes evidence
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Primary evidence
Evidence relationship
Probiotics and Synbiotics and Insulin Resistance
Related evidence
Evidence relationship
Probiotics and Synbiotics and HbA1c
Save evidence
Evidence relationship
Probiotics and Synbiotics and Adipokine and Angiogenic Markers
Save evidence
Core evidence
Study findings
The primary outcomes reported in this study.
Evidence Intelligence™
- EvidenceScore™
- Emerging
- Score 59 · Based on 1 study
- ImpactScore™
- 50
- Neutral
- ConsistencyScore™
- unclear
- Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence TrackerEvidence Intelligence™
- EvidenceScore™
- Emerging
- Score 59 · Based on 1 study
- ImpactScore™
- 50
- Neutral
- ConsistencyScore™
- unclear
- Not enough independent studies
Supporting studies: Based on 1 study
Add to Evidence TrackerEvidence Library
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Evidence Suggest
- Several trials reported better glycemic and insulin sensitivity markers after microbiota-directed interventions.
- Some studies found stronger effects with combined or personalized strategies than with standard comparators.
- Outcome variability across studies limits confidence in a single effect size.
Who this applies to
Adults with type 2 diabetes
Keep in Mind
This is a review-level synthesis, not one primary intervention trial.
Between the Lines
- No pooled meta-analysis due to heterogeneity
- Many included trials were short-term
- Several studies had small sample sizes
- Interventions and measured outcomes varied substantially
Evidence Library
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Connected Evidence
Explore related studies, evidence collections, and research questions.
Relationships organized using the Dediabetes Evidence Intelligence™ framework.
This study contributes to evidence on Probiotics and Synbiotics and HbA1c, Probiotics and Synbiotics and Insulin Resistance.
Related evidence relationships
Explore in Evidence ExplorerThis study contributes to the evidence on the following intervention-outcome relationships.
Supplements
Probiotics and Synbiotics → HbA1c
Supplements
Evidence Intelligence™
- EvidenceScore™
- 73
- Moderate
- ImpactScore™
- 68
- Positive
- ConsistencyScore™
- 100
- consistent
Supporting studies: Based on 3 studies
View evidenceSupplements
Evidence Intelligence™
- EvidenceScore™
- Emerging
- Score 59 · Based on 1 study
- ImpactScore™
- 50
- Neutral
- ConsistencyScore™
- unclear
- Not enough independent studies
Supporting studies: Based on 1 study
View evidenceSupplements
Evidence Intelligence™
- EvidenceScore™
- Emerging
- Score 59 · Based on 1 study
- ImpactScore™
- 50
- Neutral
- ConsistencyScore™
- unclear
- Not enough independent studies
Supporting studies: Based on 1 study
View evidenceIncluded in these evidence collections
Curated evidence collections and hubs this study is part of.
HbA1c Evidence Hub
All studies measuring HbA1c
3 studies
outcome_hubMeasures HbA1c as a key outcome.
Probiotics and Synbiotics Evidence Hub
All studies on Probiotics and Synbiotics
3 studies
intervention_hubContributes to Probiotics and Synbiotics evidence base.
Adipokine and Angiogenic Markers Evidence Hub
All studies measuring Adipokine and Angiogenic Markers
1 studies
outcome_hubMeasures Adipokine and Angiogenic Markers as a key outcome.
Insulin Resistance Evidence Hub
All studies measuring Insulin Resistance
1 studies
outcome_hubMeasures Insulin Resistance as a key outcome.
Explore more in Evidence Explorer
Jump to pre-filtered views in Evidence Explorer.
All studies on Probiotics and HbA1c
Intervention: ProbioticsOutcome: HbA1c
3 results
All studies on Probiotics and Insulin resistance
Intervention: ProbioticsOutcome: Insulin resistance
1 results
All studies on Probiotics
Intervention: Probiotics
3 results
All studies measuring HbA1c
Outcome: HbA1c
3 results
All studies measuring Insulin resistance
Outcome: Insulin resistance
1 results
Questions answered by this study
Generated from the study's connected evidence using Evidence Intelligence™.
Does Probiotics and Synbiotics improve insulin resistance?
Strong Evidence
Probiotics and Synbiotics may improve Insulin Resistance.
ConsistencyScore™: Results are generally consistent across studies.
Ranked evidence signals
- 1
Insulin resistance
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on 5 supporting studies with generally consistent results and a positive effect signal.
Limitations
- Population details are unavailable.
Does Probiotics and Synbiotics improve HbA1c?
Strong Evidence
Probiotics and Synbiotics appears to improve HbA1c.
ConsistencyScore™: Results are consistent across studies.
Ranked evidence signals
- 1
HbA1c
EvidenceScore™ Moderate | EvidenceScore™ 73.2 | moderate positive | ConsistencyScore™ Consistent | 1 study
Why this answer: This answer is based on 12 supporting studies with consistent results and a positive effect signal.
Limitations
- Population details are unavailable.
Does Probiotics and Synbiotics improve adipokine and angiogenic markers?
Strong Evidence
Probiotics and Synbiotics may improve Adipokine and Angiogenic Markers.
ConsistencyScore™: Results are generally consistent across studies.
Ranked evidence signals
- 1
LDL cholesterol
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on 10 supporting studies with generally consistent results and a positive effect signal.
Limitations
- Population details are unavailable.
Next steps
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Evidence topics
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