Olive oil is an allowed fat in the system.
Original statement
زيت الزيتون — مسموح
not verbatim – paraphrase. Translation by the project; the Arabic wording is authoritative.
Translation
Olive oil is an allowed fat in the system.
Origin
- Source status
- Archive food list
- Attribution
- Archive food list (eltayebat.com/foods; EN: /en/foods/)
- Origin
- https://eltayebat.com/foods/
- Attribution uncertainty
- Classification by the archive; no rationale or video reference given on the list page.
- Claimed mechanism
Not stated (natural fat).
- Claimed health effect
Implied: healthy/acceptable.
- Population concerned
Everyone.
- Geographic restriction by Elawady
none found
Diverging source versions
اشوِ السمك بزيت الزيتون.
- Source status
- Third-party site (unofficial)
- Attribution
- Third-party site altayybat.com (unofficial)
- Origin
- https://altayybat.com/ar/
- Attribution uncertainty
- Unofficial fan/summary site; lowest attribution level; no video references given.
Scientific assessment
Mostly true – Correct at its core, but with limitations or minor inaccuracies.
Certainty of evidence: moderate – Further research may still affect the assessment.
1. What was claimed?
Olive oil is allowed.
2. What is demonstrably correct?
PREDIMED (I-FAT-04): HR 0.69 (0.53-0.91) for major cardiovascular events with Mediterranean diet + extra-virgin olive oil vs control (high-risk Spanish adults). WHO suggests replacing saturated fat with plant-source MUFA (conditional) (I-FAT-08).
3. What is wrong or exaggerated?
The PREDIMED effect is for a whole Mediterranean diet with olive oil, not olive oil alone; the original 2013 publication was withdrawn and re-published because of randomisation irregularities. The archive's classification conflicts with Elawady's later advice to avoid olive oil (C-FAT-04).
4. What remains unclear?
Effect of olive oil in diets otherwise rich in ghee/butter.
5. Which studies support it?
6. Which studies contradict it?
None for health; internal contradiction with C-FAT-04.
7. What applies to Germany and Europe?
Olive and rapeseed oil are commonly recommended plant oils in Europe (not separately verified).
8. What is known about Egypt?
Olive oil adulteration is a reported concern in many markets (not verified here for Egypt).
9. What practical conclusion is appropriate?
Allowing olive oil is consistent with the evidence; it is a better default cooking fat than ghee.
Assessment details
- Rationale for certainty of evidence
A large RCT (PREDIMED, corrected re-analysis) found fewer major cardiovascular events with a Mediterranean diet supplemented with extra-virgin olive oil vs a low-fat control diet; WHO conditionally recommends plant-source MUFA as a replacement for saturated fat.
- Source quality
Archive food list; contradicted by Elawady's own later statements (see C-FAT-04).
- Regional transferability
Olive oil is produced and consumed in Egypt and the Mediterranean.
- Individual exceptions
Energy-dense; quantity matters for weight.
- Regional scope of the claim
- general (biological/medical)
- Last reviewed
- 26 October 2026 provisional
Scientific evidence in detail
Scientifically well supported – The claim agrees with consistent, high-quality evidence.
Research question: Is allowing olive oil consistent with evidence on cardiovascular health and mortality?
Research question in detail (PECO)
- Population
- Adults
- Intervention or exposure
- Olive oil intake
- Comparison
- Animal fats or no olive oil
- Geographic scope
- universal
- Outcomes
- Cardiovascular events
- Mortality
Study results as reported by the authors. Our assessment follows below.
What speaks for the claim?
Spanish trial: Mediterranean diet with olive oil prevented heart events
Estruch R et al.. N Engl J Med 2018 · PMID 29897866 · DOI 10.1056/NEJMoa1800389 Randomised controlled trialabstract checkedPREDIMED (re-analysed): Mediterranean diet with extra-virgin olive oil reduced major cardiovascular events.
- Actual result
- HR 0.69 (0.53-0.91) (existing).
- Methodological quality
- moderate-high (RCT)
- Relevance
- direct
- Limitations
- Whole-diet intervention; randomisation irregularities corrected.
Olive oil users lived longer in US cohorts
Guasch-Ferre M et al.. J Am Coll Cardiol 2022 · PMID 35027106 · DOI 10.1016/j.jacc.2021.10.041 Cohort studyabstract checkednewly addedUS cohorts: >7 g/day olive oil associated with lower mortality.
- Actual result
- HR 0.81 (0.78-0.84).
- Methodological quality
- moderate
- Relevance
- direct
- Limitations
- Observational; similar to other vegetable oils.
What speaks against the claim?
No high-quality evidence against the claim was found.
What does the overall evidence say?
Editorial assessment based on the studies above – not itself a study result.
Which position is better supported?
Allowing olive oil is consistent with good evidence.
Why some studies weigh more
RCT plus large cohorts.
Is a causal relationship established? Probable RCT evidence for a pattern including olive oil.
Remaining uncertainty
Effect of olive oil alone.
Justified conclusion
Correct classification.
Does this depend on the country?
- General biological effects
- Universal.
- Origin of the food
- Adulteration of market olive oil occurs in Egypt (I-FAT-106).
A regional difference that changes the conclusion is not supported by robust data.
Statistical re-check
- CI log-symmetry – Symmetric. recalculated
Certainty of the overall evidence (GRADE, simplified)
- Main outcome
- Cardiovascular events with olive oil-rich diet
- Starting level
- high (randomised trials)
- Reasons for downgrading
- indirectness (whole diet)
- Result
- moderate
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
- USDA/HHS: Dietary Guidelines for Americans, 2025-2030 (2026) · Original publication
Dairy 3 servings/day (full-fat, no added sugar); full-fat dairy important for children; calcium-rich dairy in pregnancy; olive oil prioritised for cooking, butter or beef tallow as other options; saturated fat should not exceed 10% of daily calories (I-DRY-101). - WHO: Saturated fatty acid and trans-fatty acid intake for adults and children: WHO guideline (2023) · Original publication
Landing page fetched (17 July 2023). Recommendations as registered in I-FAT-08: reduce saturated fat to 10% of energy (strong); replace with PUFA (strong), plant MUFA or fibre-rich carbohydrate (conditional).
Search strategy
Documented literature searches for this review (search strings in the original database syntax).
| Database | Date | Search | Looking for | Hits | Included |
|---|---|---|---|---|---|
| PubMed | 26 October 2026 | "olive oil"[tiab] AND (mortality[tiab]) AND (cohort*[tiab]) AND (Guasch-Ferre M[au]) | contradicting evidence | 5 | |
| Europe PMC | 26 October 2026 | (butter) AND (mortality OR cardiovascular) AND ("plant-based oils" OR "olive oil" OR "vegetable oil") AND (cohort) AND PUB_YEAR:[2021 TO 2026] | both directions | 1300 |
Open questions
None material.
How deeply was this checked?
4 linked studies: 2 checked in full text (0 of them with a structured risk-of-bias assessment), 2 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
In plain language
The archive lists olive oil as allowed. This fits the research: a large Spanish trial found fewer heart attacks and strokes in people at high risk who followed a Mediterranean diet with extra olive oil. Health bodies advise using plant oils like olive oil instead of animal fats. Note that Dr. Elawady himself later advised against olive oil in some live videos.
Studies on this claim
Studies supporting the claim (4)
-
Spanish trial: Mediterranean diet with olive oil prevented heart events
Estruch R et al.. N Engl J Med 2018 · PMID 29897866 · DOI 10.1056/NEJMoa1800389Randomised controlled trialindependent cross-checkabstract checked★ key studyHR 0.69; events 3.8% vs 4.4%.
Does the study support the specific claim? Yes · 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?
Test Mediterranean diet.
- How was the study done?
RCT, 4.8 years.
- How many people, animals or samples were studied?
7,447 high-risk adults.
- What was actually found?
Fewer major CV events.
- How large was the observed effect?
HR 0.69 (0.53-0.91).
- What do the results mean in everyday life?
Olive oil as part of a Mediterranean diet benefits the heart.
- What are the study's limitations?
Randomisation problems corrected.
- What does it say about Elawady's specific claim?
Supports olive oil.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Effect of olive oil alone.
-
WHO: keep saturated fat at or below 10% of energy
World Health Organization. WHO guideline 2023Guideline / position statementindependent cross-checkfull text checkedReplace with plant oils rich in unsaturated fats.
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?
Set SFA/TFA intake limits.
- How was the study done?
WHO guideline.
- How many people, animals or samples were studied?
Global.
- What was actually found?
Limit SFA to 10% of energy.
- How large was the observed effect?
Strong recommendation.
- What do the results mean in everyday life?
Use plant oils instead of animal fats.
- What are the study's limitations?
Population advice.
- What does it say about Elawady's specific claim?
Contradicts unrestricted ghee.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Effect of a single meal.
-
Olive oil users lived longer in US cohorts
Guasch-Ferre M et al.. J Am Coll Cardiol 2022 · PMID 35027106 · DOI 10.1016/j.jacc.2021.10.041Cohort studyindependent cross-checkabstract checked★ key study>7 g/day: 19% lower mortality; similar to other vegetable oils.
Olive oil linked to 19% lower mortality.
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?
Study olive oil and mortality.
- How was the study done?
Two cohorts, 28 years.
- How many people, animals or samples were studied?
92,383 adults.
- What was actually found?
Lower mortality with olive oil.
- How large was the observed effect?
HR 0.81 (0.78-0.84).
- What do the results mean in everyday life?
Olive oil is a healthy choice; other plant oils similar.
- What are the study's limitations?
Observational.
- What does it say about Elawady's specific claim?
Supports allowing olive oil.
- Do the results apply to Germany and Europe?
Applicable.
- What can explicitly not be concluded from this study?
Cannot prove causation.
-
New US dietary guidelines (2026) recommend dairy and olive oil, allow butter in limits
U.S. Department of Agriculture; U.S. Department of Health and Human Services. Federal dietary guideline (PDF, realfood.gov; linked from dietaryguidelines.gov) 2026Guideline / position statementindependent cross-checkfull text checked★ key studyThree servings of dairy a day, including milk and yogurt, for children and adults; olive oil first, butter as an option, saturated fat at most 10% of calories.
Olive oil named as the fat to prioritise.
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?
Give official food advice for the US population.
- How was the study done?
Government guideline document.
- How many people, animals or samples were studied?
Whole population.
- What was actually found?
Dairy recommended at all ages; saturated fat limit kept; olive oil prioritised.
- How large was the observed effect?
Not applicable.
- What do the results mean in everyday life?
Milk, yogurt and cheese are all recommended; butter is allowed but not preferred.
- What are the study's limitations?
Policy document; evidence review not read; contested changes.
- What does it say about Elawady's specific claim?
Contradicts banning milk and yogurt; does not support unlimited ghee or butter.
- Do the results apply to Germany and Europe?
US; similar dairy advice exists in the UK (NHS).
- What can explicitly not be concluded from this study?
Cannot show health effects by itself.
No study in this group is marked as key.
Studies contradicting or limiting the claim (0)
No studies in this group.
Studies with mixed or unclear results (0)
No studies in this group.
Regional context
Germany / EU
Olive and rapeseed oil are commonly recommended plant oils in Europe (not separately verified).
Egypt
Olive oil adulteration is a reported concern in many markets (not verified here for Egypt).
What applies in my country?
General scientific assessment
Mostly true Allowing olive oil is in line with good evidence.
This statement concerns biological or medical relationships. The scientific assessment above applies regardless of the country; country-specific food data do not change it.
References
- Primary Prevention of Cardiovascular Disease with a Mediterranean Diet Supplemented with Extra-Virgin Olive Oil or Nuts.. Estruch R et al.. N Engl J Med 2018 · PMID 29897866 · DOI 10.1056/NEJMoa1800389
- Saturated fatty acid and trans-fatty acid intake for adults and children: WHO guideline. World Health Organization. WHO guideline 2023
- Consumption of Olive Oil and Risk of Total and Cause-Specific Mortality Among U.S. Adults.. Guasch-Ferre M et al.. J Am Coll Cardiol 2022 · PMID 35027106 · DOI 10.1016/j.jacc.2021.10.041
- Dietary Guidelines for Americans, 2025-2030. U.S. Department of Agriculture; U.S. Department of Health and Human Services. Federal dietary guideline (PDF, realfood.gov; linked from dietaryguidelines.gov) 2026