Animal studycited by the Tayebat archiveabstract only checked★ key study A-SOD-09 in-depth review
Sweeteners, gut bacteria and blood sugar
Artificial sweeteners induce glucose intolerance by altering the gut microbiota.
Overview
Suez J et al.. Nature 2014 · PMID 25231862 · DOI 10.1038/nature13793
In mice, sweeteners changed gut bacteria and caused glucose intolerance; a small human test showed similar effects.
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?
Do non-caloric artificial sweeteners alter glucose tolerance via the microbiota?
- How was the study done?
Mouse experiments (antibiotics, faecal transplants into germ-free mice) plus human observational/intervention data.
- How many people, animals or samples were studied?
Not stated in abstract; Mice; healthy human subjects
- What was actually found?
NAS induced glucose intolerance via microbiota; abrogated by antibiotics; transferable via faecal transplant; similar dysbiosis and glucose intolerance demonstrated in healthy human subjects.
- How large was the observed effect?
Not applicable
- What do the results mean in everyday life?
Some sweeteners may affect blood sugar via gut bacteria.
- What are the study's limitations?
Human data small (size not in abstract); Commercial formulations contained glucose fillers (not in abstract); Short-term
- What does it say about Elawady's specific claim?
Mechanistic support for C-SOD-07.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
That diet soda causes diabetes, stroke or dementia.
Scientific in-depth review
1. Full reference
- Authors
- Suez J, Korem T, Zeevi D, Zilberman-Schapira G, Thaiss CA, Maza O, Israeli D, Zmora N, Gilad S, Weinberger A, Kuperman Y, Harmelin A, Kolodkin-Gal I, Shapiro H, Halpern Z, Segal E, Elinav E
- Journal
- Nature
- Year
- 2014
- Identifier
- PMID 25231862 DOI 10.1038/nature13793
- Verification
- verified – PubMed E-utilities efetch, 2026-10-25
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
No COI statement in record
2. Research question
Do non-caloric artificial sweeteners alter glucose tolerance via the microbiota?
3. Study design and population
- Study design
- Animal study – Mouse experiments (antibiotics, faecal transplants into germ-free mice) plus human observational/intervention data.
- Population
Mice; healthy human subjects
- Country
Israel
- Period
not stated in abstract
- Sample size
Not stated in abstract
- Inclusion and exclusion criteria
not stated in abstract
4. Methods and endpoints
- Exposure / intervention
Commercial NAS formulations
- Comparator
Water/sugar controls
- Endpoints
Glucose tolerance; microbiome composition and function
- Statistical methods
Experimental comparisons
5. Actual results
- Results
NAS induced glucose intolerance via microbiota; abrogated by antibiotics; transferable via faecal transplant; similar dysbiosis and glucose intolerance demonstrated in healthy human subjects.
- Absolute risks
not applicable
- Authors' conclusion
Results link NAS consumption, dysbiosis and metabolic abnormalities, calling for reassessment of massive NAS usage.
6. Strengths
- Causal mouse experiments with transplantation
- High-profile, mechanistic
7. Weaknesses
- Human data small (size not in abstract)
- Commercial formulations contained glucose fillers (not in abstract)
- Short-term
8. Risk of bias
- Orienting tool
- none applicable
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- not assessable
- Rationale
Mainly animal experiments.
9. Assessment of the statistical interpretation
Not applicable.
10. Relevance to the specific claim
Mechanistic support for C-SOD-07.
11. Independent contrary findings
I-SOD-03 (2022 RCT): effects sweetener- and person-specific.
12. Transferability to Germany and Europe
High.
13. Overall methodological judgement
Influential mechanistic study; human relevance partly confirmed for some sweeteners.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | not assessable |
| Precision of results | not applicable |
| Directness | indirect |
| Reproducibility | partly replicated |
| Consistency with the overall evidence | mixed |
| Regional transferability | high |
| Adequacy of the interpretation (by the archive) | partly correct but over-interpreted |
14. Open questions
Long-term clinical relevance.
15. Linked fact checks
- Artificial sweeteners disturb the beneficial gut bacteria and thereby induce glucose intolerance in animals and humans. – Studies supporting the claim
Use by the Tayebat archive
Note: according to the archive, the studies were compiled by the archive operators. Whether Dr. Elawady himself cited this study is not established.
- What the archive says about the study
Artificial sweeteners alter the gut microbiome and induce glucose intolerance in mice and in healthy human volunteers.
- A. What was actually studied?
NAS effects on microbiota and glucose tolerance.
- B. What did the authors find?
Microbiota-dependent glucose intolerance in mice; similar findings in humans.
- C. What conclusions do the authors themselves draw?
Calls for reassessment of NAS use.
- D. What does the archive derive from it?
Uses it as mechanism for diet-soda harm including stroke/dementia ('part of the mechanism').
- E. Is this derivation scientifically justified?
Partly: the summary is accurate, but linking it to stroke and dementia is speculation; human evidence was small.
- Adequacy of the interpretation (by the archive)
- partly correct but over-interpreted