One diet soda per day nearly triples the risk of ischaemic stroke and of Alzheimer's dementia.
Original statement
تبيَّن أن مَن يشرب علبة دايت واحدة يومياً يرتفع لديه خطر السكتة الدماغية الإقفارية إلى ما يقرب من ثلاثة أضعاف (HR=2.96)، وخطر ألزهايمر أيضاً نحو ثلاثة أضعاف (HR=2.89).
verbatim according to source. Translation by the project; the Arabic wording is authoritative.
Translation
One diet soda per day nearly triples the risk of ischaemic stroke and of Alzheimer's dementia.
Origin
- Source status
- Archive editors
- Attribution
- Archive editors (study selection and narrative are the archive's, not necessarily Elawady's)
- Origin
- https://eltayebat.com/rule/soda/
- Attribution uncertainty
- The archive homepage states that the forbidden-food section is supported by research 'independently of Dr. Diaa's words'. No evidence was found that Elawady himself cited these studies.
- Claimed mechanism
Artificial sweeteners (partly via gut microbiome, according to the archive).
- Claimed health effect
Ischaemic stroke, Alzheimer's dementia.
- Population concerned
Adults >45/ >60 years
- Geographic restriction by Elawady
none found
Scientific assessment
Potentially false – The available evidence tends to speak against the statement, but is not conclusive.
Certainty of evidence: very low – Any assessment is very uncertain.
1. What was claimed?
Daily diet soda roughly triples stroke and dementia risk.
2. What is demonstrably correct?
Pase 2017 (A-SOD-02) did report HR 2.96 (1.26-6.97) for ischaemic stroke and 2.89 (1.18-7.07) for Alzheimer's disease for daily cumulative intake vs none. WHI (I-SOD-06) also found a positive association (ischaemic stroke HR 1.31 for >=2/day).
3. What is wrong or exaggerated?
The magnitude ('triple') comes from few events and very wide CIs; for dementia, the association was no longer statistically significant after adjustment for cardiometabolic factors (all-cause dementia HR 1.70, 0.80-3.61; Alzheimer's HR 2.03, 0.83-4.97), daily diet-soda drinkers had about three times the diabetes prevalence, and many comparisons were uncorrected, so the finding is hypothesis-generating (A-SOD-02); WHI with 81,714 women found a much smaller effect. The archive's 'more than 4,000 adults' is inaccurate (2,888 for stroke, 1,484 for dementia). The causal link to the Nature 2014 microbiome paper is the archive's speculation; that paper did not study stroke or dementia. Reverse causation (sicker people choose diet drinks) is a recognised problem.
4. What remains unclear?
Whether artificially sweetened beverages have any causal effect on stroke or dementia.
5. Which studies support it?
A-SOD-02; I-SOD-06 (direction).
6. Which studies contradict it?
I-SOD-06 (much smaller effect size); I-SOD-08 notes confounding in NSS evidence.
7. What applies to Germany and Europe?
EFSA and JECFA consider approved sweeteners safe within ADIs; no regulatory body has concluded that diet drinks cause stroke or dementia.
8. What is known about Egypt?
No Egypt-specific data.
9. What practical conclusion is appropriate?
There is no strong reason to drink diet sodas for health, but fear of a tripled stroke risk is not supported.
Assessment details
- Rationale for certainty of evidence
Single cohort with 82 ischaemic strokes and 63 Alzheimer cases; very wide confidence intervals; reverse causation likely (people with obesity/diabetes switch to diet drinks); a much larger cohort (WHI) found a far smaller association for ischaemic stroke (HR 1.31 at >=2/day).
- Source quality
Numbers reported correctly, but the archive presents an imprecise association from one small cohort as a near-tripling of risk and links it causally to the microbiome without evidence.
- Regional transferability
Moderate.
- Individual exceptions
Not applicable.
- Regional scope of the claim
- general (biological/medical)
- Last reviewed
- 25 October 2026 provisional
In plain language
One US study of under 3,000 people found that daily diet-soda drinkers had about three times more strokes and dementia. The number of cases was small and the uncertainty very large. A much larger study found a far smaller link. People with weight or diabetes problems often switch to diet drinks, which can create such links without the drink being the cause.
Studies on this claim
Studies supporting the claim (0)
No studies in this group.
Studies contradicting or limiting the claim (2)
-
Diet drinks and stroke in 81,000 women
Mossavar-Rahmani Y et al.. Stroke 2019 · PMID 30802187 · DOI 10.1161/STROKEAHA.118.023100Cohort studyindependent cross-checkabstract only checkedWomen drinking two or more diet drinks daily had 31% more ischaemic strokes; far less than the 'triple' figure.
Does the study support the specific claim? Partly · Methodological quality: high · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
Is ASB intake associated with stroke, CHD and mortality?
- How was the study done?
Prospective cohort (WHI Observational Study).
- How many people, animals or samples were studied?
81,714; Postmenopausal women 50-79
- What was actually found?
>=2 ASB/day vs <1/week: all stroke HR 1.23 (1.02-1.47); ischaemic stroke 1.31 (1.06-1.63); CHD 1.29 (1.11-1.51); all-cause mortality 1.16 (1.07-1.26); small-artery occlusion stroke 2.44 in women without CVD/diabetes.
- How large was the observed effect?
HR 1.31 (1.06-1.63) ischaemic stroke
- What do the results mean in everyday life?
A modest association, possibly confounded.
- What are the study's limitations?
Reverse causation; Single population; Observational design; residual confounding possible; Self-reported dietary intake
- What does it say about Elawady's specific claim?
Mixed/limiting for C-SOD-06 (direction supported, magnitude much smaller).
- Do the results apply to Germany and Europe?
Moderate.
- What can explicitly not be concluded from this study?
Causation.
-
WHO on non-sugar sweeteners
World Health Organization. WHO news release 2023Guideline / position statementindependent cross-checkfull text checked★ key studyWHO advises not to use sweeteners for weight control, because no long-term benefit was shown; possible harms may be confounded.
Does the study support the specific claim? Partly · Methodological quality: high · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
Should NSS be used for weight control/NCD risk reduction?
- How was the study done?
International guideline (news release read in full).
- How many people, animals or samples were studied?
Not applicable; All people except those with pre-existing diabetes
- What was actually found?
Recommends against NSS to control weight or reduce NCD risk; NSS confer no long-term benefit for body fat; potential undesirable effects (T2D, CVD, mortality) from long-term use; recommendation conditional because observed links might be confounded by baseline characteristics and complicated patterns of NSS use.
- How large was the observed effect?
Not applicable
- What do the results mean in everyday life?
Water or unsweetened drinks are preferable.
- What are the study's limitations?
Conditional; observational evidence for harms
- What does it say about Elawady's specific claim?
Supports C-SOD-10 (no proven benefit); limits C-SOD-06 (confounding).
- Do the results apply to Germany and Europe?
Applies globally.
- What can explicitly not be concluded from this study?
That sweeteners cause disease.
No study in this group is marked as key.
Studies with mixed or unclear results (1)
-
Diet soda, stroke and dementia in Framingham
Pase MP et al.. Stroke 2017 · PMID 28428346 · DOI 10.1161/STROKEAHA.116.016027Cohort studycited by the Tayebat archivefull text checked★ key studyDaily diet-soda drinkers had about three times more ischaemic strokes and Alzheimer's disease, but with very few cases and wide uncertainty.
Does the study support the specific claim? Partly · Methodological quality: moderate · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
Are sugar- or artificially sweetened beverages associated with incident stroke or dementia?
- How was the study done?
Prospective cohort (Framingham Offspring); FFQ at exams 5-7; 10-year surveillance; Cox models.
- How many people, animals or samples were studied?
2,888 (stroke; 97 strokes, 82 ischaemic); 1,484 (dementia; 81 cases, 63 Alzheimer); Framingham Offspring participants >45 y (stroke) and >60 y (dementia)
- What was actually found?
Daily cumulative ASB vs 0/week: ischaemic stroke HR 2.96 (1.26-6.97); Alzheimer's disease HR 2.89 (1.18-7.07). SSB not associated with stroke or dementia.
- How large was the observed effect?
HR 2.96 (1.26-6.97); HR 2.89 (1.18-7.07)
- What do the results mean in everyday life?
A worrying signal, but too imprecise to state a tripled risk.
- What are the study's limitations?
Few events; wide CIs; diabetes far more common in diet-soda drinkers; dementia result not robust to full adjustment; many comparisons
- What does it say about Elawady's specific claim?
Only direct evidence for C-SOD-06.
- Do the results apply to Germany and Europe?
Moderate.
- What can explicitly not be concluded from this study?
That diet soda causes stroke or dementia.
No study in this group is marked as key.
Regional context
Germany / EU
EFSA and JECFA consider approved sweeteners safe within ADIs; no regulatory body has concluded that diet drinks cause stroke or dementia.
Egypt
No Egypt-specific data.
What applies in my country?
General scientific assessment
Potentially false A small single study; the 'triple risk' figure is not reliable and causation is not shown.
The following areas of food safety are relevant to this statement:
- Additives and processing
- Controls, imports, recalls, labelling
Honey, sugar, sweets
Choose a country to see the checked information for it.
Limits: legal rules describe what is allowed, not what every single food contains. Measurement data come from samples and are meaningful only together with their method details.
Country of residence or purchase Compare with another country
References
- Artificially Sweetened Beverages and Stroke, Coronary Heart Disease, and All-Cause Mortality in the Women's Health Initiative.. Mossavar-Rahmani Y et al.. Stroke 2019 · PMID 30802187 · DOI 10.1161/STROKEAHA.118.023100
- WHO advises not to use non-sugar sweeteners for weight control in newly released guideline (Use of non-sugar sweeteners: WHO guideline, 2023) — news release. World Health Organization. WHO news release 2023
- Sugar- and Artificially Sweetened Beverages and the Risks of Incident Stroke and Dementia: A Prospective Cohort Study.. Pase MP et al.. Stroke 2017 · PMID 28428346 · DOI 10.1161/STROKEAHA.116.016027