Nezam El-Tayebat Fact CheckA scientific assessment of the “نظام الطيبات” nutrition system
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Mostly false Certainty of evidence: low provisional C-GUT-08

Drinking a lot of water harms the liver; one should drink only when thirsty and not 'flood' the body with water.

Conclusion: Mostly false: no evidence that water harms the liver; thirst alone is not always a good guide.
  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

شرب الميه كتير يضر الكبد طبعا طبعا

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

Translation

Drinking a lot of water harms the liver; one should drink only when thirsty and not 'flood' the body with water.

Origin

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr.D Clinics - Diaa Al Awady is live! الالتهاب الخلوي ❤️❤️❤️ (Open source)
Published
25 May 2025
Timestamp
0:12:00 (location in the original video’s automatic YouTube caption track; confirms where the words occur, not who speaks)
Attribution uncertainty
Short remark in a long live stream; machine transcript; context is a discussion of urea and creatinine.
Claimed mechanism

Not explained.

Claimed health effect

Liver damage; strain on organs.

Population concerned

General population.

Geographic restriction by Elawady

none found

Diverging source versions

اشرب الماء حين تعطش فقط — لا داعي لإجبار نفسك على شرب كميات محددة يومياً. الجسم يُخبرك باحتياجه للماء عبر العطش، ولا يُنصح بإغراق أجهزة جسمك بكميات مفرطة من الماء.

Source status
Third-party site (unofficial)
Attribution
Third-party site (unofficial by its own statement)
Origin
https://altayybat.com/ar/
Attribution uncertainty
Lowest attribution level; the site states it is unofficial.

دمك مباشره عشان كده ما بتخشش مباشره الميه بتعدي على الكبد الاول عشان كده الماء الكثير ضرر مباشر على خلايا الكبد الماء الكثير اللي بتتشرب ضرر مباشر وصريح على خلايا الكبد فما تسوليش ليه خلايا بتورم ورجليها بتورم

Drinking a lot of water directly harms liver cells, because water passes through the liver first; it makes cells and legs swell.

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr.D Clinics - Diaa Al Awady is live! الكلي (Open source)
Published
20 May 2025
Timestamp
0:49:09 (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; 'published' is the date listed by the archive and may be the upload date. Live-stream transcripts can contain viewer comments read aloud; the quoted passage was checked in context to be spoken by Elawady.

Scientific assessment

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

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

1. What was claimed?

Much water harms the liver; drink only when thirsty.

2. What is demonstrably correct?

Forcing very large volumes is unnecessary for healthy people, and extreme intake can cause hyponatraemia.

3. What is wrong or exaggerated?

No evidence was found that drinking water harms the liver. 'Only when thirsty' may be insufficient for older people, in hot weather or with heavy sweating, and in people prone to kidney stones.

4. What remains unclear?

No study directly testing water intake and liver damage was found; the judgement on the liver part rests on the absence of any reported effect in reviews and on renal water physiology.

5. Which studies support it?

Partly, for the second half only: no scientific studies support a fixed '8 x 8' rule for healthy adults in temperate climates (I-FAST-08).

6. Which studies contradict it?

Reviews of water and health describe water as a critical nutrient and do not report liver damage from generous intake (I-INTC-01, I-FAST-08). I-INTC-01 states that thirst is blunted in older people ('it may be prudent for the elderly to learn to drink regularly when not thirsty') and may be inadequate during exercise and in children; this review was funded by Nestlé Waters. Larger intakes are advisable in some diseases and with heavy work in hot climates (I-FAST-08). In a 5-year RCT in people with calcium kidney stones, high water intake reduced recurrences (12/99 vs 27/100) (I-FAST-09), so 'only when thirsty' is not adequate for everyone.

7. What applies to Germany and Europe?

European reference values for water intake exist (EFSA); not fetched in this review.

8. What is known about Egypt?

In Egypt's hot climate, fluid needs are often higher.

9. What practical conclusion is appropriate?

Drink regularly according to thirst, climate and activity; people with specific diseases should follow medical advice on fluid intake.

Assessment details

Rationale for certainty of evidence

No study links normal or generous water intake to liver damage (I-INTC-01, I-FAST-08). Extremely high intake over a short time can cause hyponatraemia, which affects the brain, not the liver (general knowledge; not sourced here). Thirst-guided drinking is adequate for many healthy adults but not for all, e.g. people with kidney stones (I-FAST-09) or in hot climates (I-FAST-08). Certainty raised from very_low to low because relevant reviews and an RCT are now linked; there is still no direct study of the liver question.

Source quality

Brief remark; third-party site paraphrase.

Regional transferability

Hot climate (Egypt) increases water needs.

Individual exceptions

People with heart or kidney failure or hyponatraemia may be advised to restrict fluids by their doctor.

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

In plain language

There is no evidence that drinking plenty of water damages the liver. The kidneys remove extra water. Drinking huge amounts very quickly can be dangerous because it dilutes the salt in the blood, but this is rare. Older people and people in hot climates should not rely only on thirst.

Studies on this claim

Studies supporting the claim (0)

No studies in this group.

Studies contradicting or limiting the claim (2)

  • Why the body needs water

    Popkin BM et al.. Nutr Rev 2010 · PMID 20646222 · DOI 10.1111/j.1753-4887.2010.00304.x
    Narrative reviewindependent cross-checkfull text checked

    Water is a critical nutrient; without it a person dies within days. Long-term trials on ideal intake are missing.

    No liver harm from water is described; knowledge gaps concern requirements, not liver damage.

    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?

    Summarise knowledge on water intake and health

    How was the study done?

    Narrative review

    How many people, animals or samples were studied?

    Published literature

    What was actually found?

    Water is essential; requirements are poorly measured

    How large was the observed effect?

    not applicable

    What do the results mean in everyday life?

    We cannot live without water; how much each person needs varies.

    What are the study's limitations?

    Not systematic; funded by a bottled-water company; no long-term trials exist

    What does it say about Elawady's specific claim?

    Contradicts 'zero intake gives health'; gives no evidence that water harms the liver; notes that thirst alone may not suffice for older people, children and during exercise

    Do the results apply to Germany and Europe?

    Applicable

    What can explicitly not be concluded from this study?

    Exact water requirement for an individual

    Scientific details →

  • Drinking more water to prevent kidney stones

    Borghi L et al.. J Urol 1996 · PMID 8583588
    Randomised controlled trialindependent cross-checkabstract only checked

    Over five years, stones came back in 12% of those drinking a lot vs 27% without advice.

    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?

    High water intake and calcium stone recurrence

    How was the study done?

    Randomised prospective 5-year study

    How many people, animals or samples were studied?

    199 patients; First-episode idiopathic calcium stone formers (plus 101 controls)

    What was actually found?

    Recurrence halved.

    How large was the observed effect?

    12% vs 27%

    What do the results mean in everyday life?

    Stone formers should drink more.

    What are the study's limitations?

    Not blinded; Single centre

    What does it say about Elawady's specific claim?

    Contradicts C-FAST-10; limits C-FAST-09.

    Do the results apply to Germany and Europe?

    Italian; directly applicable.

    What can explicitly not be concluded from this study?

    Benefits in people without stones.

    Scientific details →

Studies with mixed or unclear results (1)

  • Do we need eight glasses of water a day?

    Valtin H. Am J Physiol Regul Integr Comp Physiol 2002 · PMID 12376390 · DOI 10.1152/ajpregu.00365.2002
    Narrative reviewindependent cross-checkabstract only checked

    No proof for 8 glasses in healthy adults in mild climates, but more is needed in heat, hard work and some diseases.

    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?

    Is there evidence for '8 x 8' glasses of water a day?

    How was the study done?

    Narrative review

    How many people, animals or samples were studied?

    not applicable; Healthy adults

    What was actually found?

    No evidence for 8 x 8.

    How large was the observed effect?

    not applicable

    What do the results mean in everyday life?

    Thirst usually suffices if healthy and in mild climate.

    What are the study's limitations?

    Narrative; Old

    What does it say about Elawady's specific claim?

    Supports C-FAST-09; partly C-FAST-10 (no fixed high intake), with stated exceptions.

    Do the results apply to Germany and Europe?

    Temperate climate applies to Germany.

    What can explicitly not be concluded from this study?

    Advice for hot climates or patients.

    Scientific details →

Regional context

Germany / EU

European reference values for water intake exist (EFSA); not fetched in this review.

Egypt

In Egypt's hot climate, fluid needs are often higher.

What applies in my country?

General scientific assessment

Mostly false Mostly false: no evidence that water harms the liver; thirst alone is not always a good guide.

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

  1. Water, hydration, and health.. Popkin BM et al.. Nutr Rev 2010 · PMID 20646222 · DOI 10.1111/j.1753-4887.2010.00304.x
  2. Urinary volume, water and recurrences in idiopathic calcium nephrolithiasis: a 5-year randomized prospective study.. Borghi L et al.. J Urol 1996 · PMID 8583588
  3. "Drink at least eight glasses of water a day." Really? Is there scientific evidence for "8 x 8"?. Valtin H. Am J Physiol Regul Integr Comp Physiol 2002 · PMID 12376390 · DOI 10.1152/ajpregu.00365.2002

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