Meta-analysisindependent cross-checkabstract checked★ key study I-WHT-125 in-depth review
Low-carbohydrate diets slightly reduced acid reflux in trials
The Efficacy of Dietary Interventions in Patients with Gastroesophageal Reflux Disease: A Systematic Review and Meta-Analysis of Intervention Studies.
Overview
Lakananurak N et al.. Nutrients 2024 · PMID 38337748 · DOI 10.3390/nu16030464
Across three studies, low-carbohydrate diets reduced the time the oesophagus was exposed to acid by about 3 percentage points.
Does the study support the specific claim? Partly · Methodological quality: moderate
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Summarise diet treatments for GERD.
- How was the study done?
Systematic review and meta-analysis.
- How many people, animals or samples were studied?
21 studies.
- What was actually found?
Low-carbohydrate diets helped modestly.
- How large was the observed effect?
MD -2.8% acid exposure time.
- What do the results mean in everyday life?
Diet can help a little; it is not a cure.
- What are the study's limitations?
Few small studies.
- What does it say about Elawady's specific claim?
Partly supports diet change; not the claimed cure.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Cannot show that stopping white flour replaces medicines.
Scientific in-depth review
1. Full reference
- Authors
- Lakananurak N et al.
- Journal
- Nutrients
- Year
- 2024
- Identifier
- PMID 38337748 DOI 10.3390/nu16030464 · PMC10857327
- Verification
- verified – PubMed efetch 2026-10-26; Crossref works API 2026-10-26
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
No conflicts declared.
2. Research question
How effective are dietary interventions in GERD?
3. Study design and population
- Study design
- Meta-analysis – Systematic review and meta-analysis of intervention studies in GERD
- Population
Patients with GERD in intervention studies
- Country
International
- Period
Searches to June 2023
- Sample size
21 studies, 16 types of intervention (3 low-carbohydrate)
- Inclusion and exclusion criteria
Intervention studies in GERD patients
4. Methods and endpoints
- Exposure / intervention
Dietary interventions (low-carbohydrate, high-fat, eating speed, low-FODMAP, other)
- Comparator
Control diets
- Endpoints
Oesophageal acid exposure time; reflux events; symptoms
- Statistical methods
Meta-analysis where possible
5. Actual results
- Results
Low-carbohydrate diets reduced oesophageal acid exposure time (MD -2.834%, 95% CI -4.554 to -1.114); slow eating did not reduce reflux events (RR 1.044, 0.543-2.004); most other interventions positive only in single studies.
- Absolute risks
not reported
- Authors' conclusion
Low-carbohydrate diets improved GERD outcomes; the overall evidence on dietary interventions remains scarce; long-term RCTs are needed.
6. Strengths
- Recent systematic search
7. Weaknesses
- Only 3 low-carbohydrate studies
- Short interventions
- Not specific to white flour
8. Risk of bias
- Orienting tool
- AMSTAR 2
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- some concerns
- Rationale
Few small studies; quality grading not described in abstract.
9. Assessment of the statistical interpretation
MD CI symmetric (stats/C-WHT-08); effect of about 3 percentage points in acid exposure time.
10. Relevance to the specific claim
Partial support: reducing carbohydrate lowers acid exposure modestly; does not test white-flour elimination or medicine withdrawal.
11. Independent contrary findings
I-WHT-119 (GI irrelevant to heartburn).
12. Transferability to Germany and Europe
High.
13. Overall methodological judgement
Supports a modest diet effect only.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | some concerns |
| Precision of results | low |
| Directness | indirect |
| Reproducibility | partly replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | high |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
Long-term trials, white-flour-specific trials.
15. Linked fact checks
- Stopping all white-flour products for about 5-10 days (in one video: within seven days) resolves reflux so that acid-reducing medicines are no longer needed. – Studies with mixed or unclear results
- Reflux (heartburn) and irritable bowel syndrome are largely driven by eating habits; removing white/baladi bread, baked goods and soft drinks can improve symptoms. – Studies supporting the claim