Phytic acid in legumes inhibits iron and zinc absorption; iron bioavailability is 5-12% from vegetarian diets versus 14-18% from mixed diets.
Original statement
No Arabic original wording available.
Translation
Phytic acid in legumes inhibits iron and zinc absorption; iron bioavailability is 5-12% from vegetarian diets versus 14-18% from mixed diets.
Origin
- Source status
- Archive editors
- Attribution
- Archive editors
- Origin
- https://eltayebat.com/rule/legumes/
- Attribution uncertainty
- Archive editorial text and study selection written by the archive operators, not necessarily by Elawady.
- Claimed mechanism
Phytate chelates iron and zinc in the gut.
- Claimed health effect
Reduced mineral absorption; anaemia.
- Population concerned
Everyone, especially plant-based eaters
- Geographic restriction by Elawady
none found
Diverging source versions
- Source status
- Archive editors
- Attribution
- Archive editors
- Origin
- https://eltayebat.com/rule/legumes/
- Attribution uncertainty
- The archive narrative also states that Elawady linked the spread of fava beans in Egyptian food culture with anaemia he sees in his clinic; no video reference 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?
Phytate in legumes impairs iron and zinc absorption.
2. What is demonstrably correct?
Correct as a mechanism (Hurrell & Egli 2010; Sandberg 2002).
3. What is wrong or exaggerated?
The archive omits that (a) in multi-meal studies with varied diets the effect is modest, (b) processing degrades phytate, and (c) Sandberg 2002 states that 'in a balanced diet containing animal protein a high intake of legumes is not considered a risk in terms of mineral supply'. The vegetarian-diet percentages are attributed to legumes although they describe whole diets.
4. What remains unclear?
Contribution of fava consumption to anaemia in Egypt is not quantified; anaemia in Egypt has multiple causes (not reviewed here).
5. Which studies support it?
Hurrell & Egli 2010; Sandberg 2002.
6. Which studies contradict it?
Sandberg 2002 (same source, conclusion on balanced diets).
7. What applies to Germany and Europe?
Iron deficiency in Germany mostly concerns menstruating women, pregnancy and restrictive diets; legumes are recommended by guidelines.
8. What is known about Egypt?
Iron-deficiency anaemia is common in Egypt; combining ful with tomato, lemon or meat improves absorption.
9. What practical conclusion is appropriate?
Phytate is a real absorption inhibitor, but legumes in a mixed diet are a net source of iron and zinc.
Assessment details
- Rationale for certainty of evidence
Single-meal isotope studies consistently show phytate inhibition; but in varied multi-meal diets the effect of single inhibitors is more modest, iron status of the person matters more, and soaking, germination, fermentation and cooking reduce phytate.
- Source quality
Archive cites two reputable reviews correctly; it omits their qualifications.
- Regional transferability
The 5-12% vs 14-18% figures refer to vegetarian vs mixed diets in people without iron stores, not to legumes specifically.
- Individual exceptions
People with low iron stores, vegetarians/vegans, children and pregnant women benefit from combining legumes with vitamin C or meat/fish and from soaking/fermentation.
- Regional scope of the claim
- general (biological/medical)
- Last reviewed
- 25 October 2026 provisional
In plain language
Legumes contain phytic acid, which reduces how much iron and zinc the body absorbs from a meal. This is correct. However, the archive's own source states that in a balanced diet with some animal foods, eating many legumes is not a risk for mineral supply. Soaking, sprouting, fermenting and cooking reduce phytic acid, and vitamin C in the same meal improves iron absorption.
Studies on this claim
Studies supporting the claim (2)
-
Iron absorption from different diets
Hurrell R, Egli I. Am J Clin Nutr 2010 · PMID 20200263 · DOI 10.3945/ajcn.2010.28674FNarrative reviewcited by the Tayebat archiveabstract only checked★ key studyIron absorption is lower from vegetarian than mixed diets; in varied diets single inhibitors matter less than iron status.
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?
Estimate iron bioavailability
- How was the study done?
Review
- How many people, animals or samples were studied?
Isotope studies
- What was actually found?
14-18% mixed, 5-12% vegetarian
- How large was the observed effect?
Not applicable
- What do the results mean in everyday life?
Combine legumes with vitamin C or meat/fish.
- What are the study's limitations?
Not legume-specific
- What does it say about Elawady's specific claim?
Partly supports phytate concern
- Do the results apply to Germany and Europe?
High
- What can explicitly not be concluded from this study?
Cannot show legumes cause anaemia in mixed diets.
-
Minerals from legumes
Sandberg AS. Br J Nutr 2002 · PMID 12498628 · DOI 10.1079/BJN/2002718Narrative reviewcited by the Tayebat archiveabstract only checkedPhytate reduces iron and zinc absorption, but processing reduces phytate and balanced diets are not at risk.
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?
Review legume minerals
- How was the study done?
Narrative review
- How many people, animals or samples were studied?
Not applicable
- What was actually found?
Phytate inhibits; soaking/fermenting helps
- How large was the observed effect?
Not applicable
- What do the results mean in everyday life?
Soak, sprout or ferment legumes.
- What are the study's limitations?
Narrative
- What does it say about Elawady's specific claim?
Limits the archive's claim
- Do the results apply to Germany and Europe?
High
- What can explicitly not be concluded from this study?
Cannot support a legume ban.
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
Iron deficiency in Germany mostly concerns menstruating women, pregnancy and restrictive diets; legumes are recommended by guidelines.
Egypt
Iron-deficiency anaemia is common in Egypt; combining ful with tomato, lemon or meat improves absorption.
What applies in my country?
General scientific assessment
Mostly true Correct mechanism; overstated as a reason to avoid legumes.
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)
Legumes and nuts
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.
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References
- Iron bioavailability and dietary reference values.. Hurrell R, Egli I. Am J Clin Nutr 2010 · PMID 20200263 · DOI 10.3945/ajcn.2010.28674F
- Bioavailability of minerals in legumes.. Sandberg AS. Br J Nutr 2002 · PMID 12498628 · DOI 10.1079/BJN/2002718