Last updated September 2, 2026
Key finding
1h-PG was lower in the fiber group (8.09 ± 1.26) compared to the control group (8.88 ± 1.84); P = 0.015.
This study investigated the effects of dietary fiber supplementation on gestational diabetes risk and pregnancy outcomes, finding significant improvements in glucose levels and weight gain.
Quick read
The essential study design details in one scan.
EvidenceScore™
Moderate
Study type
RCTs
Follow-up
Short-Term (≤3 mo)
Risk of bias
Some Concerns
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Plain-language summary
A plain-language read of the study’s main message and where it applies.
Study focus
This study investigated the effects of dietary fiber supplementation on gestational diabetes risk and pregnancy outcomes, finding significant improvements in glucose levels and weight gain.
These findings suggest that dietary fiber could be a simple and effective intervention to improve pregnancy outcomes and reduce the risk of gestational diabetes, which is crucial for maternal and fetal health. With gestational diabetes linked to various complications, incorporating fiber into prenatal care may enhance overall pregnancy management.
The study's sample size and demographic diversity may limit generalizability. The effectiveness of dietary fiber supplementation on gestational diabetes incidence remains unclear. Potential confounding factors were not fully controlled for in the analysis.
Published in
Publication details and source links for this paper.
Dongyao Z, Jing S, Pengyuan H, et al. Dietary Fiber Supplementation Reduces Gestational Diabetes Risk and Improves Pregnancy Outcomes. Frontiers in Endocrinology. 2026;17:1794560. doi:10.3389/fendo.2026.1794560
1-hour postprandial glucose was lower in the fiber group (8.09 ± 1.26) compared to the control group (8.88 ± 1.84); P = 0.015.
Whole-OGTT glucose AUC was lower in the fiber group (13.68 ± 1.83) compared to the control group (14.78 ± 2.61); P = 0.018.
Gestational weight gain was reduced in the fiber group (1.83 kg) compared to the control group (2.54 kg); P = 0.016.
The fiber group had a complete absence of preterm births (0%) compared to the control group (12.0%); P = 0.040.
Evidence network
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This study contributes evidence to Normal care, Soluble dietary fiber supplementation and Gestational diabetes mellitus incidence, C-peptide incremental area under the curve (iAUC), Gestational weight gain, and 3 more.
This study contributes evidence to
Primary intervention
Normal care
Primary outcomes
Primary intervention
Intervention and outcome relationships this study adds to the evidence network.
Editorial context
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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.
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Evidence pairs
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Contributes evidence
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Contributes evidence
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Contributes evidence
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Contributes evidence
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Primary evidence
Evidence topic
matched_outcome
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Core evidence
The primary outcomes reported in this study.
Normal care → Gestational diabetes mellitus incidence
Normal care → Gestational diabetes mellitus incidence
Soluble dietary fiber supplementation → C-peptide incremental area under the curve (iAUC)
Soluble dietary fiber supplementation → C-peptide incremental area under the curve (iAUC)
Soluble dietary fiber supplementation → Gestational weight gain
Soluble dietary fiber supplementation → Gestational weight gain
Soluble dietary fiber supplementation → Glucose iAUC (OGTT)
Soluble dietary fiber supplementation → Glucose iAUC (OGTT)
Soluble dietary fiber supplementation → Rate of preterm delivery (<37 weeks)
Soluble dietary fiber supplementation → Rate of preterm delivery (<37 weeks)
Soluble dietary fiber supplementation → Whole-OGTT glucose AUC
Soluble dietary fiber supplementation → Whole-OGTT glucose AUC
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Relationships organized using the Dediabetes Evidence Intelligence™ framework.
This study contributes to evidence on Normal care and Diabetes Incidence and Prevention, Soluble dietary fiber supplementation and Postprandial and OGTT Glucose.
This study contributes to the evidence on the following intervention-outcome relationships.
Diet and Nutrition
Diet and Nutrition
Curated evidence collections and hubs this study is part of.
All studies measuring Diabetes Incidence and Prevention
Measures Diabetes Incidence and Prevention as a key outcome.
All studies on Normal care
Contributes to Normal care evidence base.
All studies measuring Body Weight
Measures Body Weight as a key outcome.
All studies measuring Postprandial and OGTT Glucose
Measures Postprandial and OGTT Glucose as a key outcome.
All studies on Soluble dietary fiber supplementation
Contributes to Soluble dietary fiber supplementation evidence base.
Jump to pre-filtered views in Evidence Explorer.
2 results
1 results
2 results
1 results
2 results
Generated from the study's connected evidence using Evidence Intelligence™.
Current evidence does not show a clear reduction in gestational diabetes mellitus incidence with Normal care.
ConsistencyScore™: Results are consistent across studies.
Ranked evidence signals
Gestational diabetes mellitus incidence
EvidenceScore™ Moderate | EvidenceScore™ 69.0 | neutral | ConsistencyScore™ Consistent | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Soluble dietary fiber supplementation appears to improve c-peptide incremental area under the curve (IAUC).
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
C-peptide incremental area under the curve (iAUC)
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Soluble dietary fiber supplementation appears to improve gestational weight gain.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
Gestational weight gain
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Soluble dietary fiber supplementation appears to improve glucose iauc (OGTT).
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
Glucose iAUC (OGTT)
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
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