Nezam El-Tayebat Fact CheckA scientific assessment of the “نظام الطيبات” nutrition system
Choose country
Choose language: English

Potentially false Not supported by high-quality evidence Certainty of evidence: low provisional C-GRN-07

Potatoes in all forms are allowed, including fried potatoes and packaged potato chips (crisps).

In short: This claim is potentially false. Boiled and baked potatoes are fine, but eating French fries and chips without restriction is not supported: they are associated with weight gain, and French fries also with type 2 diabetes and high blood pressure.
Conclusion: Boiled and baked potatoes are fine; unrestricted French fries and chips are not supported, as both are linked to weight gain and fries also to diabetes and high blood pressure.
  1. Original statement
  2. Scientific assessment
  3. Scientific evidence in detail
  4. In plain language
  5. Studies on this claim
  6. Regional context
  7. What applies in my country?
  8. References

Original statement

بطاطس (مقلية/مسلوقة/محمّرة) ... الشيبس مسموح ضمن النظام. يُفضَّل الشيبس المقلي في زيت نباتي طبيعي وبدون نكهات مضافة كثيرة.

verbatim according to source. Translation by the project; the Arabic wording is authoritative.

Translation

Potatoes in all forms are allowed, including fried potatoes and packaged potato chips (crisps).

Origin

Source status
Third-party site (unofficial)
Attribution
Third-party site (unofficial; lowest attribution level)
Origin
https://altayybat.com/ar/
Attribution uncertainty
altayybat.com allowed list and snack section.
Claimed mechanism

Not specified (potatoes do not 'stick' like flour).

Claimed health effect

Harmless.

Population concerned

Everyone.

Geographic restriction by Elawady

none found

Diverging source versions

Source status
Archive food list
Attribution
Archive food list (eltayebat.com)
Origin
https://eltayebat.com/foods/
Attribution uncertainty
eltayebat.com: 'البطاطس والبطاطا ✅ مسموح' (preparation not specified).
Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr Diaa Al Awady د ضياء العوضي is live!صباح الخير اتباع العوضي (Open source)
Published
19 September 2025
Timestamp
not available (transcript has no timings)
Attribution uncertainty
Machine transcript; sample day: 'كل توستايه بشويه بطاطس محمره ... وشربت عصير قصب في النص مرتين ثلاثه'.
Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr Diaa Al Awady د ضياء العوضي is live! (Open source)
Published
18 February 2026
Timestamp
not available (transcript has no timings)
Attribution uncertainty
Machine transcript: 'تاكل بطاطس محمره بس ما تجيبش البطاطس الحمراء هاتها الصفرا'.

بص انا باكل ايه شيبسي برده بالخل

Look what I eat: chips too, with vinegar.

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr Diaa Al Awady د ضياء العوضي is live! الكورتيزون حياتك (Open source)
Published
17 October 2025
Timestamp
1:26:08 (location in the original video’s automatic YouTube caption track; confirms where the words occur, not who speaks)
Attribution uncertainty
Archive transcript (YouTube CC or AI-generated); no timestamps; YouTube original not checked; wording may contain recognition errors. Supports chips as allowed.

Scientific assessment

Potentially false – The available evidence tends to speak against the statement, but is not conclusive.

Certainty of evidence: low – Further research is likely to change the assessment considerably.

1. What was claimed?

Fried potatoes and chips are freely allowed.

2. What is demonstrably correct?

Boiled, baked and mashed potatoes are not associated with T2D (pooled HR 1.01, 0.98-1.05; I-GRN-04). For packaged potato or corn chips (crisps), the same cohorts found no T2D association after full adjustment (HR 1.02, 0.98-1.06; I-GRN-04), so the T2D evidence does not contradict the allowance of chips.

3. What is wrong or exaggerated?

Frequent French fries are associated with higher T2D risk (HR 1.20 per 3 servings/week; I-GRN-04) and, in one smaller cohort, fried potatoes with higher mortality (I-GRN-05). Most potato varieties are high-GI (I-GRN-07), which conflicts with the archive's GL argument against watermelon.

4. What remains unclear?

Causality; role of frying oil and accompanying diet. Other outcomes of crisps (salt, acrylamide, energy density) were not reviewed here, so no judgement on chips beyond T2D is made.

5. Which studies support it?

I-GRN-04 (boiled/baked/mashed potatoes and potato or corn chips not associated with T2D).

6. Which studies contradict it?

I-GRN-04 (French fries and T2D), I-GRN-05 (fried potatoes and mortality), I-GRN-119 (French fries and hypertension, HR 1.17), I-GRN-121 (potato chips and French fries most strongly associated with long-term weight gain).

7. What applies to Germany and Europe?

No European guideline reviewed here recommends unrestricted fried potatoes; acrylamide in fried potato products is a separate EU regulatory topic not reviewed here.

8. What is known about Egypt?

Fried potatoes and chips are common snacks.

9. What practical conclusion is appropriate?

Prefer boiled/baked potatoes; limit fried potatoes and chips.

Assessment details

Rationale for certainty of evidence

Boiled, baked or mashed potatoes were not associated with T2D (pooled HR 1.01), but French fries were (HR 1.20 per 3 servings/week; meta-analysis HR 1.16) (I-GRN-04). A smaller cohort found frequent fried potato intake (>=3 times/week) associated with higher mortality (HR 2.26, 1.15-4.47) (I-GRN-05). Observational evidence, so low certainty; the claim is 'potentially false' only for the unrestricted allowance of fried potatoes (French fries). In the same cohorts potato or corn chips (crisps; one combined questionnaire item) were not associated with T2D after full adjustment (HR 1.02, 0.98-1.06 per 3 servings/week; I-GRN-04); other possible concerns about crisps (salt, acrylamide, energy density) were not reviewed here.

Source quality

Third-party list and live-stream statements.

Regional transferability

Moderate; US cohorts.

Individual exceptions

None.

Regional scope of the claim
general (biological/medical)
Last reviewed
26 October 2026 provisional

Scientific evidence in detail

Not supported by high-quality evidence – There is no good evidence for the claim; this alone does not prove it wrong.

Research question: Are all forms of potatoes, including French fries and packaged chips, free of health risk when eaten without restriction?

Research question in detail (PECO)
Population
General adult population
Intervention or exposure
Potatoes by preparation (boiled/baked/mashed, French fries, chips)
Comparison
Low or no intake
Geographic scope
universal
Outcomes
  • Type 2 diabetes
  • Hypertension
  • CVD
  • Mortality
  • Weight gain

Study results as reported by the authors. Our assessment follows below.

What speaks for the claim?

What speaks against the claim?

What does the overall evidence say?

Editorial assessment based on the studies above – not itself a study result.

Which position is better supported?

Boiled or baked potatoes are compatible with health; frequent French fries are associated with T2D, hypertension and weight gain, and chips with weight gain, so an unrestricted allowance for fried forms is not supported.

Why some studies weigh more

Large prospective cohorts and meta-analyses; all observational.

Is a causal relationship established? Possible, not established Consistent associations for fried potatoes across outcomes; residual confounding by overall diet likely.

Remaining uncertainty

Effects of home-fried potatoes in olive or other oils typical in Egypt.

Justified conclusion

Prefer boiled or baked potatoes; limit French fries and chips.

Why do studies seem to disagree?

Chips are null for T2D and hypertension (I-GRN-04, I-GRN-119) but strongly associated with weight gain (I-GRN-121): different outcomes.

Does this depend on the country?
General biological effects
Universal.
Eating habits
Fried potatoes and chips are common snacks in Egypt.
Origin of the food
Frying oil and method may differ from US cohorts.
Contaminants
Acrylamide not reviewed.
National production conditions
Not reviewed.
Legal rules
Not reviewed.
Actual monitoring data
None.

A regional difference that changes the conclusion is not supported by robust data.

Statistical re-check
  • CI symmetry – HR 1.17 (1.07-1.27) and 0.97 (0.87-1.08) consistent. recalculated
  • CI symmetry – HR 1.10 (1.04-1.17) consistent. recalculated
  • Unit conversion – Chips +0.77 kg, French fries +1.52 kg per 4 years per extra daily serving. recalculated
Certainty of the overall evidence (GRADE, simplified)
Main outcome
Cardiometabolic risk with frequent fried potatoes
Starting level
low (observational studies)
Reasons for upgrading
  • consistency across outcomes
Result
low

Simplified assessment by a single reviewer, following the GRADE approach; not a formal GRADE panel. GRADE rates the body of evidence for one outcome, not individual studies.

Clinical guidelines and official statements checked
  • American Heart Association: 2021 Dietary Guidance to Improve Cardiovascular Health (Lichtenstein et al., Circulation 2021) (2021) · Original publication
    Abstract: choose whole grain foods and products; choose minimally processed foods instead of ultra-processed foods; minimise added sugars.
Search strategy

Documented literature searches for this review (search strings in the original database syntax).

DatabaseDateSearchLooking forHitsIncluded
PubMed26 October 2026(potato*[ti] OR french fries[ti] OR fried potato*[ti]) AND (mortality[tiab] OR cardiovascular[tiab] OR hypertension[tiab] OR diabetes[tiab] OR weight[tiab]) AND (meta-analysis[pt] OR systematic review[pt] OR cohort*[ti])both directions31
PubMed26 October 2026Changes in diet and lifestyle and long-term weight gain in women and men[ti]contradicting evidence3

Open questions

Egyptian frying practices.

How deeply was this checked?

6 linked studies: 2 checked in full text (1 of them with a structured risk-of-bias assessment), 4 on the basis of the abstract, 0 bibliographically only. No formal assessment with two independent reviewers and no independent human expert review has taken place yet.

Last scientific review: 26 October 2026

History of the verdict
  1. 25 October 2026 · Phase 1 · Initial assessment: Potentially false (low)
  2. 26 October 2026 · Phase 4 (systematic evidence review) · Re-examined with extended evidence; verdict unchanged: Potentially false (low)
    Unchanged. New cohort data confirm the existing split: non-fried potatoes neutral, fried potatoes associated with harm; chips newly linked to weight gain (I-GRN-121).
    New sources: I-GRN-119 I-GRN-120 I-GRN-121

In plain language

Boiled or baked potatoes have not been linked to diabetes in large studies, and in the same studies packaged potato chips were not linked to diabetes either. French fries eaten several times a week have been linked to a higher diabetes risk, and in one smaller study fried potatoes were linked to earlier death. The system allows fries freely while banning watermelon because of blood sugar, although potatoes raise blood sugar more.

Studies on this claim

Studies supporting the claim (0)

No studies in this group.

Studies contradicting or limiting the claim (2)

  • Fried potatoes and mortality

    Veronese N et al.. Am J Clin Nutr 2017 · PMID 28592612 · DOI 10.3945/ajcn.117.154872
    Cohort studyindependent cross-checkabstract checked

    Fried potatoes 3+ times/week linked to about double the death risk in a small cohort.

    Weak.

    Does the study support the specific claim? No · Methodological quality: low · Certainty of evidence: see overall assessment of the claim

    Original publication · Scientific details

    Study explained simply
    What did the researchers want to find out?

    Potatoes and death

    How was the study done?

    Cohort

    How many people, animals or samples were studied?

    4440

    What was actually found?

    Fried linked

    How large was the observed effect?

    HR 2.26

    What do the results mean in everyday life?

    Possible risk

    What are the study's limitations?

    Small

    What does it say about Elawady's specific claim?

    Weak

    Do the results apply to Germany and Europe?

    Moderate

    What can explicitly not be concluded from this study?

    Cause

    Scientific details →

  • Chips and fries were the foods most linked to weight gain

    Mozaffarian D et al.. N Engl J Med 2011 · PMID 21696306 · DOI 10.1056/NEJMoa1014296
    Cohort studyindependent cross-checkfull text checked★ key study

    In 120,877 US adults, each extra daily serving of potato chips was linked to 0.8 kg and French fries to 1.5 kg more weight gain over 4 years.

    Chips and French fries were the foods most strongly associated with weight gain.

    Does the study support the specific claim? No · 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?

    Find foods linked to weight gain.

    How was the study done?

    Three cohorts, change analysis.

    How many people, animals or samples were studied?

    120,877 adults.

    What was actually found?

    Chips, potatoes, sugary drinks, meats linked to gain.

    How large was the observed effect?

    Chips +1.69 lb/4 y per daily serving.

    What do the results mean in everyday life?

    Chips and fries are not neutral foods.

    What are the study's limitations?

    Self-report.

    What does it say about Elawady's specific claim?

    Contradicts unrestricted chips and fries; supports a small refined-grain effect.

    Do the results apply to Germany and Europe?

    Moderate.

    What can explicitly not be concluded from this study?

    Cannot prove causation.

    Scientific details →

Studies with mixed or unclear results (4)

  • Glycaemic index tables

    Atkinson FS et al.. Am J Clin Nutr 2021 · PMID 34258626 · DOI 10.1093/ajcn/nqab233
    Systematic reviewindependent cross-checkabstract checked

    Fruits usually have a low GI; most potatoes have a high GI.

    Potatoes mostly high GI.

    Does the study support the specific claim? No · 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?

    GI values

    How was the study done?

    Tabulation

    How many people, animals or samples were studied?

    >4000 foods

    What was actually found?

    Fruits low, potatoes high

    What do the results mean in everyday life?

    Potatoes raise sugar more than most fruit

    What are the study's limitations?

    Abstract only

    What does it say about Elawady's specific claim?

    Undermines selective melon ban

    Do the results apply to Germany and Europe?

    High

    Scientific details →

  • Potatoes, fries and diabetes

    Mousavi SM et al.. BMJ 2025 · PMID 40769531 · DOI 10.1136/bmj-2024-082121
    Cohort studyindependent cross-checkfull text, structured risk-of-bias assessment★ key study

    Eating fries 3 more times a week was linked to 20% higher diabetes risk; boiled, baked or mashed potatoes and potato/corn chips showed no clear link. Swapping potatoes for whole grains was linked to lower risk, swapping for white rice to higher risk.

    Fries.

    Does the study support the specific claim? No · 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?

    Potatoes and diabetes

    How was the study done?

    Cohorts + meta-analysis

    How many people, animals or samples were studied?

    205,107

    What was actually found?

    Fries linked, boiled not

    How large was the observed effect?

    HR 1.20

    What do the results mean in everyday life?

    Prefer boiled potatoes; limit fries

    What are the study's limitations?

    Observational; US health professionals; boiled/baked/mashed and potato/corn chips each measured together

    What does it say about Elawady's specific claim?

    Limits the allowance of fried potatoes; does not show harm from boiled potatoes; chips data inconclusive (combined with corn chips)

    Do the results apply to Germany and Europe?

    Moderate

    What can explicitly not be concluded from this study?

    Cause

    Scientific details →

  • French fries were linked to high blood pressure, chips were not

    Borgi L et al.. BMJ 2016 · PMID 27189229 · DOI 10.1136/bmj.i2351
    Cohort studyindependent cross-checkabstract checked

    In 187,000 US adults, eating French fries 4+ times a week was linked to 17% higher hypertension risk.

    French fries associated with hypertension; chips not; boiled potatoes borderline.

    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?

    Potatoes and hypertension.

    How was the study done?

    Three cohorts.

    How many people, animals or samples were studied?

    187,453 adults.

    What was actually found?

    Fries linked; chips not.

    How large was the observed effect?

    HR 1.17 for fries.

    What do the results mean in everyday life?

    Limit fried potatoes.

    What are the study's limitations?

    Self-report.

    What does it say about Elawady's specific claim?

    Contradicts unrestricted fried potatoes.

    Do the results apply to Germany and Europe?

    Moderate.

    What can explicitly not be concluded from this study?

    Cannot prove causation.

    Scientific details →

  • Potatoes overall were not linked to heart disease; fried potatoes slightly to high blood pressure

    Djousse L et al.. Nutrients 2025 · PMID 39940309 · DOI 10.3390/nu17030451
    Meta-analysisindependent cross-checkabstract checked

    In seven cohorts, total potato intake was not associated with CVD; fried potatoes 1+ times a week were linked to 10% higher hypertension risk.

    Non-fried potatoes not associated with CVD/HTN; fried potatoes associated with hypertension.

    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?

    Potatoes and CVD/hypertension.

    How was the study done?

    Pooled cohort analysis.

    How many people, animals or samples were studied?

    110,063 adults.

    What was actually found?

    No CVD link; fried potato and hypertension.

    How large was the observed effect?

    HR 1.10 for hypertension.

    What do the results mean in everyday life?

    Boiled potatoes are fine; limit fried.

    What are the study's limitations?

    Industry-linked grant.

    What does it say about Elawady's specific claim?

    Partly supports, partly contradicts the claim.

    Do the results apply to Germany and Europe?

    Moderate.

    What can explicitly not be concluded from this study?

    Cannot prove causation.

    Scientific details →

Regional context

Germany / EU

No European guideline reviewed here recommends unrestricted fried potatoes; acrylamide in fried potato products is a separate EU regulatory topic not reviewed here.

Egypt

Fried potatoes and chips are common snacks.

What applies in my country?

General scientific assessment

Potentially false Boiled and baked potatoes are fine; unrestricted French fries and chips are not supported, as both are linked to weight gain and fries also to diabetes and high blood pressure.

The following areas of food safety are relevant to this statement:

  • Pesticides and pesticide residues
  • Contaminants (heavy metals, PFAS, PCBs, dioxins, nitrate)
  • Mycotoxins (mould toxins)
  • Additives and processing
  • Controls, imports, recalls, labelling

Cereals and rice

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

  1. Fried potato consumption is associated with elevated mortality: an 8-y longitudinal cohort study.. Veronese N et al.. Am J Clin Nutr 2017 · PMID 28592612 · DOI 10.3945/ajcn.117.154872
  2. Changes in diet and lifestyle and long-term weight gain in women and men.. Mozaffarian D et al.. N Engl J Med 2011 · PMID 21696306 · DOI 10.1056/NEJMoa1014296
  3. International tables of glycemic index and glycemic load values 2021: a systematic review.. Atkinson FS et al.. Am J Clin Nutr 2021 · PMID 34258626 · DOI 10.1093/ajcn/nqab233
  4. Total and specific potato intake and risk of type 2 diabetes: results from three US cohort studies and a substitution meta-analysis of prospective cohorts.. Mousavi SM et al.. BMJ 2025 · PMID 40769531 · DOI 10.1136/bmj-2024-082121
  5. Potato intake and incidence of hypertension: results from three prospective US cohort studies.. Borgi L et al.. BMJ 2016 · PMID 27189229 · DOI 10.1136/bmj.i2351
  6. Potato Consumption and Risk of Cardiovascular Disease in a Harmonized Analysis of Seven Prospective Cohorts.. Djousse L et al.. Nutrients 2025 · PMID 39940309 · DOI 10.3390/nu17030451

← Back to overview