Mostly false Certainty of evidence: moderate provisional C-SRC-24

Tea is the second most dangerous and worst drink of all (after carbonated drinks); although it is full of antioxidants, it is a bad drink that causes constipation and acid reflux and thereby problems in the rest of the body.

Conclusion: Tea is not a dangerous drink at usual intake; its real downsides (iron absorption, very hot temperature) differ from those he names.

Original statement

وتاني اخطر مشروب واسواقهم على الاطلاق الشاي الشاي اللي ملان انتي اوكسنت ده مشروب سيء يساوي امساك يساوي ارتجاع مريق دغري يساوي مشاكل بقيه الجسم

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

Translation

Tea is the second most dangerous and worst drink of all (after carbonated drinks); although it is full of antioxidants, it is a bad drink that causes constipation and acid reflux and thereby problems in the rest of the body.

Origin

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
الجن . آلام العمود الفقري . الحقيقه والسراب (Open source)
Published
26 November 2025
Timestamp
0:42:42 (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; wording may contain speech-recognition errors; speaker turns are not marked, the excerpt was judged to be Elawady's own speech from context.
Claimed mechanism

Not stated; he acknowledges that tea contains flavonoids and antioxidants.

Claimed health effect

Constipation, acid reflux and downstream 'problems in the rest of the body'.

Population concerned

Tea drinkers in general.

Geographic restriction by Elawady

none found

Diverging source versions

ما هو الشاي هيعمل لك امساك الشاي هيعمل امساك بالرغم ان هو ملان في لافينويد وانتي اوكسدنت ومضاد للسرطان

Tea will give you constipation; tea causes constipation, even though it is full of flavonoids and antioxidants and is anti-cancer.

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
حقيقه جرثومه المعده . #ضياء_العوضي (Open source)
Published
15 December 2025
Timestamp
0:27:29 (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; wording may contain speech-recognition errors; speaker turns are not marked, the excerpt was judged to be Elawady's own speech from context.

Scientific assessment

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

Certainty of evidence: moderate – Further research may still affect the assessment.

1. What was claimed?

Tea is the second most dangerous drink and causes constipation and reflux, despite its antioxidants.

2. What is demonstrably correct?

Tea does have a real downside he does not mention: tannins in tea taken with meals inhibit the absorption of plant (non-haem) iron (I-INTA-04), which matters for people with iron deficiency or plant-based diets. Very hot tea (above 55-60 °C) is associated with oesophageal and gastric cancer (I-INTA-03). In East Asian studies tea drinking was associated with higher odds of reflux disease (OR 1.27, 1.07-1.51; I-INTA-01). He correctly notes that tea contains flavonoids and antioxidants.

3. What is wrong or exaggerated?

Calling tea one of the most dangerous drinks is contradicted by large cohort data: highest versus lowest tea intake was associated with 10% lower all-cause mortality (0.90, 0.86-0.95) and 14% lower cardiovascular mortality (0.86, 0.79-0.94) in nearly 2 million people (I-INTA-02), and an umbrella review of 96 meta-analyses found more benefit than harm at usual intake (I-INTA-03). Overall, tea was not significantly associated with reflux disease (OR 1.12, 0.98-1.27), and in Middle Asian studies it was associated with lower odds (I-INTA-01).

4. What remains unclear?

We found no human study showing that tea causes constipation at usual intake (PubMed search 'tea consumption constipation', 2026-10-25, returned mainly animal or unrelated studies). The observational design of the mortality studies cannot prove that tea itself lowers risk.

5. Which studies support it?

I-INTA-04 (iron absorption), I-INTA-03 (very hot tea), regional subgroup in I-INTA-01.

6. Which studies contradict it?

I-INTA-02, I-INTA-03, I-INTA-01 (overall).

7. What applies to Germany and Europe?

Tea is not restricted in European dietary guidance; no specific guideline was fetched for this review.

8. What is known about Egypt?

Tea is a very common drink in Egypt; no Egypt-specific outcome data were found. Drinking tea with or right after meals may matter for iron status where iron deficiency is common.

9. What practical conclusion is appropriate?

Usual tea drinking is not dangerous for most people. It is reasonable to let tea cool before drinking, to avoid tea with meals when iron deficiency is a concern, and to cut down if tea clearly triggers personal reflux symptoms.

Assessment details

Rationale for certainty of evidence

Large prospective cohort meta-analyses and an umbrella review consistently associate usual tea intake with lower mortality and more benefit than harm; the reflux meta-analysis shows no significant overall association. Evidence is observational, and data on constipation are lacking, so certainty is moderate rather than high.

Source quality

Elawady's own words in an archive machine transcript (live stream); exact wording may contain recognition errors.

Regional transferability

Mostly transferable; Egypt-specific tea habits (strength, sugar, temperature, drinking with meals) were not studied in the sources read.

Individual exceptions

Some people notice reflux symptoms after tea or caffeine; people with iron deficiency or at risk of it may benefit from not drinking tea with meals.

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

In plain language

Dr. Elawady called tea the second most dangerous drink and said it causes constipation and heartburn. Studies of almost two million people found that tea drinkers had somewhat lower death rates, not higher. Across 30 studies, tea was not clearly linked to reflux overall. Tea does reduce iron absorption when drunk with meals, and very hot tea is linked to throat and stomach cancer. These are reasons to drink it cooler and between meals, not to call it dangerous.

Studies on this claim

Studies supporting the claim (1)

  • Does tea block iron from food?

    Disler PB et al.. Gut 1975 · PMID 1168162 · DOI 10.1136/gut.16.3.193
    Otherindependent cross-checkabstract only checked

    Tea taken with meals reduced absorption of plant (non-haem) iron in volunteers.

    Supports a real downside of tea (iron absorption), different from the harms he names.

    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?

    Tea and iron absorption

    How was the study done?

    Absorption studies in volunteers

    How many people, animals or samples were studied?

    Not stated in abstract

    What was actually found?

    Tea inhibited non-haem iron absorption

    How large was the observed effect?

    Not given in abstract

    What do the results mean in everyday life?

    People at risk of iron deficiency may drink tea between rather than with meals

    What are the study's limitations?

    Old; short-term

    What does it say about Elawady's specific claim?

    Supports a different harm than constipation/reflux

    Do the results apply to Germany and Europe?

    High

    What can explicitly not be concluded from this study?

    Effects on long-term iron status

    Scientific details →

Studies contradicting or limiting the claim (2)

  • Do tea drinkers live shorter or longer?

    Kim Y et al.. Epidemiology and health 2024 · PMID 38938012 · DOI 10.4178/epih.e2024056
    Meta-analysisindependent cross-checkfull text checked★ key study

    Across nearly 2 million people, tea drinkers had about 10% lower death rates than non-drinkers.

    Tea drinkers had lower, not higher, mortality.

    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?

    Tea and risk of death

    How was the study done?

    Meta-analysis of 38 cohort data sets

    How many people, animals or samples were studied?

    1,956,549 participants

    What was actually found?

    Lower all-cause and cardiovascular mortality with tea

    How large was the observed effect?

    All-cause 0.90 (0.86-0.95); CVD 0.86 (0.79-0.94)

    What do the results mean in everyday life?

    Usual tea drinking is not linked to harm

    What are the study's limitations?

    Observational; high heterogeneity; benefit seen mainly in Asian studies, not in European ones

    What does it say about Elawady's specific claim?

    Contradicts 'second most dangerous drink'

    Do the results apply to Germany and Europe?

    Moderate (no association in European cohorts, but no harm either)

    What can explicitly not be concluded from this study?

    That tea itself causes the lower risk

    Scientific details →

  • Is tea good or bad for health overall?

    Yi M et al.. Molecular nutrition & food research 2019 · PMID 31216091 · DOI 10.1002/mnfr.201900389
    Systematic reviewindependent cross-checkabstract only checked★ key study

    Across 96 meta-analyses, tea showed more benefits than harms; only very hot tea (>55-60 °C) was linked to oesophageal and gastric cancer.

    Benefit outweighs harm at usual intake; only very hot tea linked to harm.

    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?

    Overview of tea and health

    How was the study done?

    Umbrella review

    How many people, animals or samples were studied?

    96 meta-analyses

    What was actually found?

    More benefit than harm; harm only for very hot tea

    How large was the observed effect?

    Lower risks at 2-3 cups/day

    What do the results mean in everyday life?

    Normal tea drinking is safe for most people; let it cool

    What are the study's limitations?

    Observational

    What does it say about Elawady's specific claim?

    Contradicts 'dangerous drink'; supports a temperature caveat

    Do the results apply to Germany and Europe?

    Moderate

    What can explicitly not be concluded from this study?

    Causation

    Scientific details →

Studies with mixed or unclear results (1)

  • Does tea cause heartburn?

    Cao H et al.. Medicine 2019 · PMID 30681584 · DOI 10.1097/MD.0000000000014173
    Meta-analysisindependent cross-checkfull text checked★ key study

    Across 30 studies, tea drinkers did not have significantly more reflux disease overall (OR 1.12, 0.98-1.27).

    Overall no association with GERD; some regional subgroups show higher odds.

    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?

    Link between tea and reflux disease

    How was the study done?

    Meta-analysis of observational studies

    How many people, animals or samples were studied?

    30 studies from 23 articles

    What was actually found?

    No significant overall association; higher odds in East Asia, lower odds in the Middle East; cohort studies null

    How large was the observed effect?

    OR 1.12 (0.98-1.27)

    What do the results mean in everyday life?

    Tea is not a proven general cause of reflux

    What are the study's limitations?

    Mostly cross-sectional, mostly unadjusted studies; high heterogeneity; no protocol; reporting inconsistencies

    What does it say about Elawady's specific claim?

    Contradicts 'tea equals reflux' as a general rule

    Do the results apply to Germany and Europe?

    Moderate

    What can explicitly not be concluded from this study?

    Whether tea triggers symptoms in a particular person

    Scientific details →

Regional context

Germany / EU

Tea is not restricted in European dietary guidance; no specific guideline was fetched for this review.

Egypt

Tea is a very common drink in Egypt; no Egypt-specific outcome data were found. Drinking tea with or right after meals may matter for iron status where iron deficiency is common.

What applies in my country?

General scientific assessment

Mostly false Tea is not a dangerous drink at usual intake; its real downsides (iron absorption, very hot temperature) differ from those he names.

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. The effect of tea on iron absorption.. Disler PB et al.. Gut 1975 · PMID 1168162 · DOI 10.1136/gut.16.3.193
  2. Tea consumption and risk of all-cause, cardiovascular disease, and cancer mortality: a meta-analysis of thirty-eight prospective cohort data sets.. Kim Y et al.. Epidemiology and health 2024 · PMID 38938012 · DOI 10.4178/epih.e2024056
  3. Tea Consumption and Health Outcomes: Umbrella Review of Meta-Analyses of Observational Studies in Humans.. Yi M et al.. Molecular nutrition & food research 2019 · PMID 31216091 · DOI 10.1002/mnfr.201900389
  4. Association between tea consumption and gastroesophageal reflux disease: A meta-analysis.. Cao H et al.. Medicine 2019 · PMID 30681584 · DOI 10.1097/MD.0000000000014173

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