Nezam El-Tayebat Fact CheckA scientific assessment of the “نظام الطيبات” nutrition system
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Mostly false Scientifically refuted Certainty of evidence: high provisional C-GRN-02

Gluten is present in all grains, including oats, rice and maize, so 'gluten-free' bread or flour is a meaningless concept.

Safety note: Coeliac patients should not abandon certified gluten-free products based on this statement.
In short: This claim is mostly false. All cereals contain storage proteins, but only the gluten proteins of wheat, barley and rye (and rarely oats) harm people with coeliac disease; certified gluten-free products contain far less gluten and are an essential protection.
Conclusion: Rice and maize proteins are not 'gluten' in the medical sense; gluten-free foods are meaningful for coeliac disease.
  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

ده بروتين موجود في اي حبه مهما اختلف اسمها يعني في القمح اسمه جلوتن في الاوت الشوفان موجود الافن موجود في الرز الارزن موجود في الذره الزي بروتين وكلهم تحت اسم جلدين بروتين

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

Translation

Gluten is present in all grains, including oats, rice and maize, so 'gluten-free' bread or flour is a meaningless concept.

Origin

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
مشكلة الدقيق مش جلوتين (Open source)
Published
28 January 2025
Timestamp
0:09:49 (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); wording may contain transcription errors; no timestamps available.
Claimed mechanism

All cereal storage proteins are equivalent to gluten.

Claimed health effect

Gluten-free products are pointless.

Population concerned

Everyone including coeliac patients.

Geographic restriction by Elawady

none found

Diverging source versions

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr Diaa Al Awady د ضياء العوضي is live! النسيج البيني و مقدمة عن الكلي (Open source)
Published
23 July 2025
Timestamp
not available (transcript has no timings)
Attribution uncertainty
Machine transcript: 'مافيش حاجه اسمها جلوتن فري بريد'.
Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
بدأت قناة ＂Dr Diaa Al Awady د ضياء العوضي＂ بثًا مباشرًاFAQs (Open source)
Published
6 April 2026
Timestamp
not available (transcript has no timings)
Attribution uncertainty
Archive transcript (YouTube CC or AI-generated); wording may contain transcription errors; no timestamps available.

Scientific assessment

Mostly false – Essential parts of the statement are not supported by the evidence or are strongly exaggerated.

Certainty of evidence: high – Further research is very unlikely to change the assessment.

1. What was claimed?

All grains contain gluten; gluten-free is a myth.

2. What is demonstrably correct?

All cereals contain storage proteins of the prolamin family. Oats are a genuine grey zone (contamination; rare avenin sensitivity; I-GRN-111), and some coeliac patients form antibodies against maize zein (I-GRN-113), although no clinical harm from maize has been shown.

3. What is wrong or exaggerated?

Equating maize or rice proteins with wheat gluten is wrong for coeliac disease; rice and maize are standard safe staples in gluten-free diets.

4. What remains unclear?

None material.

5. Which studies support it?

None for the clinical conclusion.

6. Which studies contradict it?

I-GRN-02, I-GRN-105 (only wheat, barley and rye gluten is coeliac-toxic), I-GRN-107 (50 mg gluten/day damages the mucosa: basis of strict thresholds), I-GRN-112 (certified gluten-free flours about four times less often contaminated than unlabelled naturally gluten-free flours).

7. What applies to Germany and Europe?

In the EU, 'gluten-free' labelling of foods is regulated because the distinction matters for coeliac patients (legal text not fetched in this review).

8. What is known about Egypt?

Gluten-free products are relevant for Egyptian coeliac patients.

9. What practical conclusion is appropriate?

Coeliac patients should rely on gluten-free products and naturally gluten-free grains such as rice and maize.

Assessment details

Rationale for certainty of evidence

It is botanically correct that all cereals contain storage proteins (prolamins such as avenin in oats, oryzenin/oryzin-type proteins in rice, zein in maize). Clinically, 'gluten' means the prolamins of wheat, barley and rye that trigger coeliac disease; rice and maize prolamins do not, which is the basis of gluten-free diets in guidelines (I-GRN-02).

Source quality

Live-stream/video statement.

Regional transferability

Universal.

Individual exceptions

A minority of coeliac patients also react to oats (addressed in guidelines).

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

Scientific evidence in detail

Scientifically refuted – High-quality evidence shows the opposite, or the claim contradicts well-established physiology.

Research question: Do rice, maize and oats contain coeliac-toxic gluten, making "gluten-free" products meaningless for people with coeliac disease?

Research question in detail (PECO)
Population
People with coeliac disease
Intervention or exposure
Rice, maize, oats and products labelled gluten-free
Comparison
Wheat, barley, rye; unlabelled naturally gluten-free products
Geographic scope
universal biology; production-dependent contamination (regional market data from Turkey)
Outcomes
  • Mucosal damage/serology in coeliac disease
  • Gluten contamination of products
  • Immune recognition of non-wheat prolamins

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

What speaks for the claim?

  • Some coeliac patients make antibodies against corn protein

    Sánchez-Vargas LA et al.. Nutrients 2021 · PMID 33671228 · DOI 10.3390/nu13020649 Cross-sectional studyabstract checkednewly added

    Some newly diagnosed coeliac patients have IgA antibodies to maize zein, indicating immune cross-recognition of a non-wheat prolamin.

    Actual result
    IgA anti-zein 35.1% in coeliac vs 2.3% in controls.
    Methodological quality
    low (cross-sectional, in-house assay)
    Relevance
    indirect: antibodies, not clinical harm
    Limitations
    Cross-reactivity in untreated disease; no outcome data.

    Original publication

  • Pure oats seem safe for most people with coeliac disease

    Pinto-Sánchez MI et al.. Gastroenterology 2017 · PMID 28431885 · DOI 10.1053/j.gastro.2017.04.009 Meta-analysisabstract checkednewly added

    Oats are a genuine grey zone: contamination and rare avenin sensitivity; but pure oats did not harm coeliac patients in trials.

    Actual result
    Symptoms SMD -0.22 (-0.56 to 0.13); histology RR 0.24 (0.01-4.8); low-quality evidence.
    Methodological quality
    moderate (meta-analysis, low-quality trials)
    Relevance
    direct for oats
    Limitations
    Imprecise.

    Original publication

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?

Only the prolamins of wheat, barley and rye (and rarely oat avenin) are coeliac-toxic; rice and maize are safe staples of the gluten-free diet; certified gluten-free labelling measurably reduces gluten exposure.

Why some studies weigh more

GRADE-based guidelines and the threshold RCT outweigh an antibody prevalence study; contamination data show the label has practical value.

Is a causal relationship established? Yes, established Gluten from wheat, barley and rye causes coeliac mucosal damage at doses as low as 50 mg/day; no comparable evidence for rice or maize.

Remaining uncertainty

Whether maize prolamins harm a very small subgroup of non-responsive coeliac patients; contamination levels in Egyptian products.

Justified conclusion

"Gluten-free" is a meaningful and protective concept for coeliac patients.

Why do studies seem to disagree?

The claim mixes botany (all cereals have prolamin storage proteins, correct) with clinical toxicity (only wheat, barley, rye prolamins trigger coeliac disease). Anti-zein antibodies (I-GRN-113) show immune recognition, not mucosal harm.

Does this depend on the country?
General biological effects
Universal.
Eating habits
Rice and maize are common Egyptian staples suitable for coeliac patients.
Origin of the food
Cross-contact in milling and loose sale increases contamination (I-GRN-112).
Contaminants
Gluten contamination of naturally gluten-free flours is frequent in unregulated sale.
National production conditions
Egyptian gluten-free certification not reviewed.
Legal rules
EU Regulation (EC) 41/2009 / Codex: <=20 ppm.
Actual monitoring data
No Egyptian contamination data found.

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

Statistical re-check
  • Recalculate proportions (Wilson CI) and RR naturally vs certified gluten-free – 16.7% (9.0-28.7), 50.0% (37.3-62.7), 84.9% (72.9-92.1); RR 4.02 (2.18-7.40). recalculated
  • Relate trial dose to the 20 ppm label threshold – 0.5 kg/day of food at 20 mg/kg = 10 mg gluten, below the harmful 50 mg/day. recalculated
Certainty of the overall evidence (GRADE, simplified)
Main outcome
Coeliac mucosal harm from rice/maize vs wheat-barley-rye gluten
Starting level
high (randomised trials)
Result
high

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
  • ESsCD (European Society for the Study of Coeliac Disease): ESsCD guideline for coeliac disease and other gluten-related disorders (Al-Toma et al., UEG J 2019; study I-GRN-02) (2019) · Original publication
    Diagnostic testing (serology and biopsy) should be performed on a gluten-containing diet; a gluten-free diet should be introduced only when diagnosis is conclusive (strong, high); patients with coeliac disease should adhere to a lifelong gluten-free diet (strong, high); gluten-containing cereals are wheat, barley and rye; maize and oats are naturally gluten-free but can be contaminated; uncontaminated oats are tolerated by most patients; foods labelled gluten-free must contain <=20 ppm (EC 41/2009); NCGS is considered only after coeliac disease and wheat allergy are excluded on a gluten-containing diet; patients advised to eat whole-grain rice, maize, potatoes and vegetables.
  • American College of Gastroenterology: ACG Guidelines Update: Diagnosis and Management of Celiac Disease (Rubio-Tapia et al., Am J Gastroenterol 2023; I-GRN-105) (2023) · Original publication
    Abstract only (publisher full text blocked): coeliac disease is a permanent immune-mediated response to gluten in wheat, barley and rye; tTG antibodies for screening; biopsy required in most patients; treatment requires strict gluten-free diet and lifelong medical follow-up.
  • Academy of Nutrition and Dietetics: Celiac Disease: An Academy of Nutrition and Dietetics Evidence-Based Nutrition Practice Guideline (McDermid et al., J Acad Nutr Diet 2023) (2023) · Original publication
    Abstract: all individuals with coeliac disease should follow a gluten-free diet (1C, imperative), which may include gluten-free oats in adults (2D, conditional); children should follow a nutritionally adequate gluten-free diet.
  • NICE (UK): Coeliac disease: recognition, assessment and management (NG20), Recommendations (2015) · Original publication
    Offer serological testing for unexplained GI symptoms, fatigue, weight loss, unexplained iron/B12/folate deficiency, IBS in adults, type 1 diabetes, first-degree relatives; tests are accurate only on a gluten-containing diet; do not start a gluten-free diet until a specialist confirms the diagnosis; eat gluten in more than one meal daily for at least 6 weeks before testing; gluten-free oats can be included.
Search strategy

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

DatabaseDateSearchLooking forHitsIncluded
PubMed26 October 2026(maize[tiab] OR corn[tiab] OR zein[tiab] OR rice[tiab]) AND prolamin*[tiab] AND (celiac[tiab] OR coeliac[tiab]) AND (immun*[tiab] OR T cell*[tiab] OR IgA[tiab])supporting evidence32
Europe PMC26 October 2026(TITLE:"gluten-free" AND (TITLE:rice OR TITLE:maize OR TITLE:corn OR TITLE:oats)) AND (celiac OR coeliac) AND (contamination OR "gluten content" OR ppm)both directions41
PubMed26 October 2026(gluten-free[ti]) AND (naturally gluten-free[tiab] OR labeled gluten-free[tiab] OR labelled gluten-free[tiab]) AND (contamination[tiab] OR cross-contact[tiab]) AND (grain*[tiab] OR flour*[tiab])both directions8
PubMed26 October 2026oats[ti] AND (celiac[ti] OR coeliac[ti]) AND (meta-analysis[pt] OR systematic review[ti])both directions3
PubMed26 October 2026safe gluten threshold[ti] celiaccontradicting evidence2
PubMed26 October 2026(celiac disease[ti]) AND (guideline[ti] OR guidelines[ti]) AND 2020:2026[dp]guidelines21

Open questions

Gluten contamination of Egyptian naturally gluten-free and certified products.

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: Mostly false (high)
  2. 26 October 2026 · Phase 4 (systematic evidence review) · Re-examined with extended evidence; verdict unchanged: Mostly false (high)
    Unchanged. The botanical part (prolamins in all cereals) remains correct; new market data (I-GRN-112) and the threshold RCT (I-GRN-107) reinforce that gluten-free labelling is meaningful. Maize anti-zein antibodies (I-GRN-113) are acknowledged as weak, indirect support.
    New sources: I-GRN-107 I-GRN-111 I-GRN-112 I-GRN-113 I-GRN-105

In plain language

All grains contain proteins, but only the proteins in wheat, barley and rye harm people with coeliac disease. Rice and corn are safe for them. That is why gluten-free products exist and are useful. The statement that gluten is in all grains confuses these different proteins.

Studies on this claim

Studies supporting the claim (0)

No studies in this group.

Studies contradicting or limiting the claim (4)

  • European guideline for coeliac disease

    Al-Toma A et al.. United European Gastroenterol J 2019 · PMID 31210940 · DOI 10.1177/2050640619844125
    Guideline / position statementindependent cross-checkfull text, structured risk-of-bias assessment★ key study

    Coeliac disease needs a strict lifelong gluten-free diet; gluten is in wheat, rye and barley (not in uncontaminated rice, maize or oats); non-coeliac gluten sensitivity is recognised after coeliac disease and wheat allergy are excluded.

    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?

    Guideline

    How was the study done?

    Expert consensus guideline with GRADE grading, based on a PubMed literature review

    What was actually found?

    GFD is treatment

    What do the results mean in everyday life?

    Coeliac patients must avoid gluten

    What are the study's limitations?

    Not based on a systematic review; small expert board; no conflict-of-interest statement in available text

    What does it say about Elawady's specific claim?

    Contradicts denial and reintroduction claims

    Do the results apply to Germany and Europe?

    High

    What can explicitly not be concluded from this study?

    Does not quantify how common NCGS is or whether gluten itself (rather than fructans/ATIs) causes its symptoms

    Scientific details →

  • Certified gluten-free flour is much cleaner than loose "naturally gluten-free" flour

    Öcal HY et al.. Front Nutr 2025 · PMID 41459067 · DOI 10.3389/fnut.2025.1707584
    Measurement / residue studyindependent cross-checkfull text checked★ key study

    In Turkey, 17% of certified gluten-free flours but 50-85% of unlabelled naturally gluten-free flours exceeded the 20 ppm gluten limit.

    Certified gluten-free flours were much less contaminated; contamination of rice and corn arises from wheat cross-contact.

    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?

    Measure gluten contamination of flours.

    How was the study done?

    Laboratory testing of shop samples.

    How many people, animals or samples were studied?

    163 flours.

    What was actually found?

    Unlabelled flours often contaminated.

    How large was the observed effect?

    16.7% vs 50% vs 84.9%.

    What do the results mean in everyday life?

    Gluten-free labels make a real difference for coeliac patients.

    What are the study's limitations?

    One country.

    What does it say about Elawady's specific claim?

    Contradicts the claim that gluten-free is meaningless.

    Do the results apply to Germany and Europe?

    Moderate.

    What can explicitly not be concluded from this study?

    Does not measure health outcomes.

    Scientific details →

  • Even 50 mg of gluten a day harms the gut in coeliac disease

    Catassi C et al.. Am J Clin Nutr 2007 · PMID 17209192 · DOI 10.1093/ajcn/85.1.160
    Randomised controlled trialindependent cross-checkabstract checked★ key study

    In treated coeliac patients, 50 mg gluten daily for 3 months reduced villus height by about 20%; placebo did not.

    Explains why the gluten-free threshold matters.

    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 a safe trace-gluten level.

    How was the study done?

    Randomised blinded capsule trial.

    How many people, animals or samples were studied?

    49 adults with coeliac disease.

    What was actually found?

    50 mg/day damaged villi.

    How large was the observed effect?

    -20% Vh/Cd vs +9% on placebo.

    What do the results mean in everyday life?

    Strictness matters: small amounts are harmful.

    What are the study's limitations?

    Small, short.

    What does it say about Elawady's specific claim?

    Contradicts reintroducing gluten; supports gluten-free standards.

    Do the results apply to Germany and Europe?

    Basis of EU limit.

    What can explicitly not be concluded from this study?

    Does not define risk for each individual.

    Scientific details →

  • US specialist guideline on coeliac disease (2023)

    Rubio-Tapia A et al.. Am J Gastroenterol 2023 · PMID 36602836 · DOI 10.14309/ajg.0000000000002075
    Guideline / position statementindependent cross-checkabstract checked★ key study

    Coeliac disease is a lifelong immune reaction to gluten from wheat, barley and rye; treatment is a strict gluten-free diet with medical follow-up.

    Clinically relevant gluten = wheat, barley, rye.

    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?

    Guide diagnosis and treatment.

    How was the study done?

    Expert guideline using GRADE.

    How many people, animals or samples were studied?

    not applicable

    What was actually found?

    Antibody test, usually biopsy; strict lifelong gluten-free diet.

    How large was the observed effect?

    not applicable

    What do the results mean in everyday life?

    People with coeliac disease must avoid gluten strictly.

    What are the study's limitations?

    Only abstract read.

    What does it say about Elawady's specific claim?

    Contradicts denial of gluten disorders and gluten reintroduction.

    Do the results apply to Germany and Europe?

    Consistent with European guidance.

    What can explicitly not be concluded from this study?

    Does not address the non-coeliac claims in detail in the abstract.

    Scientific details →

Studies with mixed or unclear results (2)

  • Pure oats seem safe for most people with coeliac disease

    Pinto-Sánchez MI et al.. Gastroenterology 2017 · PMID 28431885 · DOI 10.1053/j.gastro.2017.04.009
    Meta-analysisindependent cross-checkabstract checked

    Adding uncontaminated oats for up to 12 months did not change symptoms, gut histology or antibodies, but evidence quality was low.

    Oats are a nuanced case (contamination, rare avenin sensitivity), but pure oats did not harm coeliac patients in trials.

    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?

    Assess oats safety in coeliac disease.

    How was the study done?

    Meta-analysis.

    How many people, animals or samples were studied?

    661 patients in trials.

    What was actually found?

    No harm detected.

    How large was the observed effect?

    SMD -0.22 for symptoms (n.s.).

    What do the results mean in everyday life?

    Pure oats are usually tolerated.

    What are the study's limitations?

    Low-quality evidence.

    What does it say about Elawady's specific claim?

    Shows oats are a special case, not that all grains contain coeliac-toxic gluten.

    Do the results apply to Germany and Europe?

    Moderate.

    What can explicitly not be concluded from this study?

    Cannot exclude rare reactions.

    Scientific details →

  • Some coeliac patients make antibodies against corn protein

    Sánchez-Vargas LA et al.. Nutrients 2021 · PMID 33671228 · DOI 10.3390/nu13020649
    Cross-sectional studyindependent cross-checkabstract checked

    About a third of newly diagnosed coeliac patients had antibodies to the maize protein zein, rarely seen in others.

    Shows immune cross-recognition of maize prolamin in some coeliac patients, but not clinical harm.

    Does the study support the specific claim? Partly · 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?

    Check immune reactions to maize protein.

    How was the study done?

    Blood antibody tests.

    How many people, animals or samples were studied?

    714 people.

    What was actually found?

    Anti-zein IgA common in new coeliac patients.

    How large was the observed effect?

    35.1% vs 2.3%.

    What do the results mean in everyday life?

    Maize proteins resemble gluten in some ways.

    What are the study's limitations?

    Antibodies are not disease.

    What does it say about Elawady's specific claim?

    Partly supports botanical similarity; not that maize is unsafe.

    Do the results apply to Germany and Europe?

    Moderate.

    What can explicitly not be concluded from this study?

    Cannot show that maize damages the gut.

    Scientific details →

Regional context

Germany / EU

In the EU, 'gluten-free' labelling of foods is regulated because the distinction matters for coeliac patients (legal text not fetched in this review).

Egypt

Gluten-free products are relevant for Egyptian coeliac patients.

What applies in my country?

General scientific assessment

Mostly false Rice and maize proteins are not 'gluten' in the medical sense; gluten-free foods are meaningful for coeliac disease.

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

  • Pesticides and pesticide residues
  • Mycotoxins (mould toxins)

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. European Society for the Study of Coeliac Disease (ESsCD) guideline for coeliac disease and other gluten-related disorders.. Al-Toma A et al.. United European Gastroenterol J 2019 · PMID 31210940 · DOI 10.1177/2050640619844125
  2. Naturally gluten-free flours are commonly contaminated, while commercially produced gluten-free flours are relatively safe: a market-based study in Turkey.. Öcal HY et al.. Front Nutr 2025 · PMID 41459067 · DOI 10.3389/fnut.2025.1707584
  3. A prospective, double-blind, placebo-controlled trial to establish a safe gluten threshold for patients with celiac disease.. Catassi C et al.. Am J Clin Nutr 2007 · PMID 17209192 · DOI 10.1093/ajcn/85.1.160
  4. American College of Gastroenterology Guidelines Update: Diagnosis and Management of Celiac Disease.. Rubio-Tapia A et al.. Am J Gastroenterol 2023 · PMID 36602836 · DOI 10.14309/ajg.0000000000002075
  5. Safety of Adding Oats to a Gluten-Free Diet for Patients With Celiac Disease: Systematic Review and Meta-analysis of Clinical and Observational Studies.. Pinto-Sánchez MI et al.. Gastroenterology 2017 · PMID 28431885 · DOI 10.1053/j.gastro.2017.04.009
  6. The Prevalence of Anti-Zein Antibodies: A Comparative Study between Celiac Disease and Irritable Bowel Syndrome.. Sánchez-Vargas LA et al.. Nutrients 2021 · PMID 33671228 · DOI 10.3390/nu13020649

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