Nezam El-Tayebat Fact CheckA scientific assessment of the “نظام الطيبات” nutrition system
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Mostly true Certainty of evidence: low provisional C-VEG-06

Heavy juicing of oxalate-rich greens (about 1,500 mg oxalate per day) can cause acute oxalate nephropathy, especially in people with chronic kidney disease.

Conclusion: A real but rare risk of extreme juicing, mainly in kidney patients.
  1. Original statement
  2. Scientific assessment
  3. In plain language
  4. Studies on this claim
  5. Regional context
  6. What applies in my country?
  7. References

Original statement

No Arabic original wording available.

Translation

Heavy juicing of oxalate-rich greens (about 1,500 mg oxalate per day) can cause acute oxalate nephropathy, especially in people with chronic kidney disease.

Origin

Source status
Archive editors
Attribution
Archive editors
Origin
https://eltayebat.com/rule/leafy-greens-cucurbits/
Attribution uncertainty
Archive editorial text and study selection written by the archive operators, not necessarily by Elawady.
Claimed mechanism

Massive oxalate load precipitates calcium oxalate in kidney tissue.

Claimed health effect

Acute renal failure.

Population concerned

People with CKD who consume large amounts of oxalate-rich juice

Geographic restriction by Elawady

none found

Scientific assessment

Mostly true – Correct at its core, but with limitations or minor inaccuracies.

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

1. What was claimed?

Excessive green juicing can damage the kidneys.

2. What is demonstrably correct?

Correct as a rare event: the abstract describes oxalate-induced acute renal failure from juicing and warns that oxalate-rich diets may precipitate renal failure in CKD.

3. What is wrong or exaggerated?

This concerns extreme intakes in concentrated juice form, not normal portions of cooked or raw greens.

4. What remains unclear?

The frequency of such events is unknown.

5. Which studies support it?

Getting 2013.

6. Which studies contradict it?

None.

7. What applies to Germany and Europe?

Relevant to juice cleanses marketed in Europe.

8. What is known about Egypt?

Not specific.

9. What practical conclusion is appropriate?

People with kidney disease should avoid high-dose green juices; normal vegetable intake is a different situation.

Assessment details

Rationale for certainty of evidence

Supported by case reports and a Mayo Clinic case series (3 of 65 biopsy cases with presumed diet-induced oxalate nephropathy, all with CKD). Case data cannot quantify risk; the 1,500 mg figure is from the archive card and was not verified in the abstract.

Source quality

Case report and review; archive summary broadly correct.

Regional transferability

Applies everywhere; juicing trends exist in Germany.

Individual exceptions

Primarily people with CKD; relevant for juice 'detox' regimens.

Regional scope of the claim
not specified
Last reviewed
25 October 2026 provisional

In plain language

Drinking very large amounts of juice made from spinach and similar greens can, in rare cases, damage the kidneys, mainly in people who already have kidney disease. This has been documented in case reports. It applies to extreme juicing, not to ordinary servings of vegetables.

Studies on this claim

Studies supporting the claim (1)

  • Kidney damage from green juicing

    Getting JE et al.. Am J Med 2013 · PMID 23830537 · DOI 10.1016/j.amjmed.2013.03.019
    Case series / case reportcited by the Tayebat archiveabstract only checked★ key study

    Rare kidney failure from heavy oxalate-rich juicing, mainly in people with kidney disease.

    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?

    Describe juicing nephropathy

    How was the study done?

    Case report + series

    How many people, animals or samples were studied?

    65 reviewed patients plus index case report

    What was actually found?

    Diet cause in 3 with CKD

    How large was the observed effect?

    Not applicable

    What do the results mean in everyday life?

    Kidney patients should avoid juice cleanses.

    What are the study's limitations?

    Case data

    What does it say about Elawady's specific claim?

    Supports niche risk

    Do the results apply to Germany and Europe?

    High

    What can explicitly not be concluded from this study?

    Cannot show risk of normal vegetable intake.

    Scientific details →

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

Relevant to juice cleanses marketed in Europe.

Egypt

Not specific.

What applies in my country?

General scientific assessment

Mostly true A real but rare risk of extreme juicing, mainly in kidney patients.

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

  • Pesticides and pesticide residues
  • Contaminants (heavy metals, PFAS, PCBs, dioxins, nitrate)
  • Pathogens (Salmonella, Campylobacter, etc.)

Fruit and vegetables

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. Oxalate nephropathy due to 'juicing': case report and review.. Getting JE et al.. Am J Med 2013 · PMID 23830537 · DOI 10.1016/j.amjmed.2013.03.019

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