False Certainty of evidence: high provisional C-SRC-62

Cigarettes are beneficial or at least not harmful: asked whether cigarettes are beneficial he answered 'Yes, beneficial'; elsewhere he said smoking has nothing to do with atherosclerosis and is 'not harmful at all' organically.

Safety note: Do not start or continue smoking on the basis of this claim. Quitting reduces the risk of heart attack, stroke, lung disease and cancer at any age.
Conclusion: Smoking is harmful at any level; it causes heart disease, stroke and cancer.

Original statement

انها لا تهضم يعني انت فاهم هل هل السجاير مفيده؟ اه مفيده دغري كده على طول يعني انت فاهم اللحمه ما فيهاش مشكله على

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

Translation

Cigarettes are beneficial or at least not harmful: asked whether cigarettes are beneficial he answered 'Yes, beneficial'; elsewhere he said smoking has nothing to do with atherosclerosis and is 'not harmful at all' organically.

Origin

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr Diaa Al Awady د ضياء العوضي is live! الكورتيزون حياتك (Open source)
Published
17 October 2025
Timestamp
0:16:40 (location in the original video’s automatic YouTube caption track; confirms where the words occur, not who speaks)
Attribution uncertainty
Transcript is YouTube CC or machine-generated (no timestamps); wording may contain speech-recognition errors. Speaker attribution within live streams/podcasts is not marked in the transcript; the excerpt was judged to be Elawady's own speech from context. Recurrence = number of archive transcripts matching the keyword pattern ['السجاير|سجاير|التدخين|سيجاره', 'مفيد|مش مضر|ما بتضرش|مضره'] (approximate; includes re-uploads/clips; 28 distinct text passages).
Claimed mechanism

Not stated.

Claimed health effect

Not specified.

Population concerned

Smokers.

Geographic restriction by Elawady

none found; he does not limit this statement to a country or to a production system

Diverging source versions

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr Diaa Al Awady د ضياء العوضي is live!لايف مش مهم خالص (Open source)
Published
11 February 2026
Timestamp
not available (transcript has no timings)
Attribution uncertainty
Further video in which the same statement recurs; no excerpt recorded. Archive transcript without timestamps.
Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr Diaa Al Awady د ضياء العوضي is live!لايف الخميس ❤️❤️❤️ (Open source)
Published
30 January 2026
Timestamp
not available (transcript has no timings)
Attribution uncertainty
Further video in which the same statement recurs; no excerpt recorded. Archive transcript without timestamps.
Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
بدأت قناة "Dr Diaa Al Awady د ضياء العوضي" بثًا مباشرًا تصليح مفاهيم (Open source)
Published
31 March 2026
Timestamp
not available (transcript has no timings)
Attribution uncertainty
Further video in which the same statement recurs; no excerpt recorded. Archive transcript without timestamps.

الدخان يا حبيبتي مالوش علاقه خالص بتصلب الشرايين خلاص صباح خير اه يعني السجاير مالهاش علاقه خالص بالموضوع ولو من الناحيه الشرعيه هي مش حرام ولو من الناحيه العضويه انا بقول لك مش مضره

Smoking has nothing at all to do with atherosclerosis; cigarettes have nothing to do with it; religiously they are not forbidden, and organically I tell you they are not harmful.

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr Diaa Al Awady د ضياء العوضي is live! الالتهاب ايه هوه ؟ (Open source)
Published
26 September 2025
Timestamp
1:20:43 (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

False – The statement contradicts the robust evidence.

Certainty of evidence: high – Further research is very unlikely to change the assessment.

1. What was claimed?

Cigarettes are beneficial (answer to a viewer) or not harmful, and smoking has nothing to do with atherosclerosis.

2. What is demonstrably correct?

Nothing in this health statement is supported by the evidence reviewed.

3. What is wrong or exaggerated?

Smoking one cigarette per day was associated with a relative risk of coronary heart disease of 1.48 in men and 1.57 in women (up to 1.74 and 2.19 with full adjustment), about half the excess risk of 20 per day; the authors conclude that no safe level of smoking exists for cardiovascular disease (I-INTB-21). In 50 years of follow-up of British doctors, continuing smokers died about 10 years earlier; stopping at 30 avoided almost all of the excess risk (I-CAN-01). Smoking accounts for 28.5% of US cancer deaths (I-CAN-02).

4. What remains unclear?

Whether the brief 'yes, beneficial' was meant ironically cannot be determined from the transcript; the other passage is unambiguous.

5. Which studies support it?

none

6. Which studies contradict it?

I-INTB-21, I-CAN-01, I-CAN-02, I-CAN-03.

7. What applies to Germany and Europe?

Smoking is the leading preventable cause of death in Europe (general knowledge).

8. What is known about Egypt?

Same evidence applies to Egypt; shisha and cigarettes both deliver tobacco smoke (general knowledge).

9. What practical conclusion is appropriate?

Stopping smoking at any age reduces risk; support to quit is available from physicians and pharmacists.

Assessment details

Rationale for certainty of evidence

Prospective evidence from 141 cohorts shows that even one cigarette per day markedly increases coronary heart disease and stroke risk (I-INTB-21); continuing smokers died about 10 years earlier than non-smokers (I-CAN-01); smoking is the leading risk factor for cancer deaths (I-CAN-02, I-CAN-03).

Source quality

Machine transcript of a live stream; wording may contain recognition errors; meaning checked in context. The 'yes, beneficial' answer came in a rapid question-and-answer sequence; the other passage (DMH-FBqMz0E) states clearly that cigarettes are not harmful. Related cancer statement: C-CAN-02.

Regional transferability

Universal; smoking prevalence among Egyptian men is high (general knowledge; not sourced here).

Individual exceptions

None; no safe level of smoking was identified for cardiovascular disease (I-INTB-21).

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

In plain language

Dr. Elawady said cigarettes are beneficial or not harmful and have nothing to do with hardened arteries. This is wrong. Very large studies show that even one cigarette a day raises the risk of heart disease and stroke considerably. Long-term smokers die about ten years earlier on average. Quitting at any age helps, and quitting early removes most of the extra risk.

Studies on this claim

Studies supporting the claim (0)

No studies in this group.

Studies contradicting or limiting the claim (4)

  • Even one cigarette a day harms the heart

    Hackshaw A et al.. BMJ 2018 · PMID 29367388 · DOI 10.1136/bmj.j5855
    Meta-analysisindependent cross-checkfull text checked★ key study

    One cigarette a day carries about half the heart-disease risk of 20 a day.

    No safe level of smoking for heart disease and stroke.

    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?

    Quantify light-smoking risk

    How was the study done?

    Meta-analysis

    How many people, animals or samples were studied?

    141 cohort studies in 55 reports (millions of participants)

    What was actually found?

    Large excess risk even at 1/day

    How large was the observed effect?

    CHD RR 1.48-2.19 at 1/day

    What do the results mean in everyday life?

    There is no safe amount of smoking for heart and brain blood vessels.

    What are the study's limitations?

    Observational; one database, English only; no protocol; modelled from summary data

    What does it say about Elawady's specific claim?

    Contradicts 'cigarettes are beneficial/not harmful'.

    Do the results apply to Germany and Europe?

    High

    Scientific details →

  • Smokers die about ten years earlier; quitting gives years back

    Doll R et al.. BMJ 2004 · PMID 15213107 · DOI 10.1136/bmj.38142.554479.AE
    Cohort studyindependent cross-checkabstract only checked★ key study

    Smoking tripled death rates; stopping at 30 avoided almost all the excess risk.

    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?

    Measure smoking hazards over 50 years.

    How was the study done?

    Prospective cohort.

    How many people, animals or samples were studied?

    34,439 doctors.

    What was actually found?

    Smokers die ~10 years earlier.

    How large was the observed effect?

    3-fold mortality.

    What do the results mean in everyday life?

    Stopping smoking at any age helps.

    What are the study's limitations?

    Men only.

    What does it say about Elawady's specific claim?

    Contradicts smoking dismissal.

    Do the results apply to Germany and Europe?

    High.

    What can explicitly not be concluded from this study?

    Effects of other tobacco products.

    Scientific details →

  • Four in ten cancers in the USA are linked to avoidable risk factors, led by smoking

    Islami F et al.. CA Cancer J Clin 2024 · PMID 38990124 · DOI 10.3322/caac.21858
    Risk assessmentindependent cross-checkabstract only checked★ key study

    Smoking accounted for 19% of cancers and 29% of cancer deaths; excess weight and alcohol followed.

    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 preventable cancers.

    How was the study done?

    PAF analysis.

    How many people, animals or samples were studied?

    US 2019.

    What was actually found?

    40% of cases attributable.

    How large was the observed effect?

    Smoking 19.3%/28.5%.

    What do the results mean in everyday life?

    Not smoking, healthy weight, less alcohol and a diet with fibre, fruit and vegetables lower risk.

    What are the study's limitations?

    Model assumptions.

    What does it say about Elawady's specific claim?

    Diet matters but is not the main cause.

    Do the results apply to Germany and Europe?

    Moderate.

    What can explicitly not be concluded from this study?

    Individual cause.

    Scientific details →

  • Smoking, alcohol and excess weight lead global avoidable cancer deaths

    GBD 2019 Cancer Risk Factors Collaborators. Lancet 2022 · PMID 35988567 · DOI 10.1016/S0140-6736(22)01438-6
    Risk assessmentindependent cross-checkfull text checked

    44% of cancer deaths worldwide in 2019 were attributable to known risk factors, smoking first; diet accounted for about 5-6% of cancer burden.

    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?

    Global attributable cancer burden.

    How was the study done?

    GBD modelling.

    How many people, animals or samples were studied?

    204 countries.

    What was actually found?

    4.45 million cancer deaths (44.4%) attributable to modelled risks in 2019; tobacco 33.9% of male and 10.7% of female cancer DALYs; dietary risks 5.9% and 5.1%.

    How large was the observed effect?

    4.45 million deaths.

    What do the results mean in everyday life?

    Avoid tobacco and alcohol, keep healthy weight.

    What are the study's limitations?

    Model-based estimates; sparse data in many countries; infections and UV not included.

    What does it say about Elawady's specific claim?

    Diet is one factor among several.

    Do the results apply to Germany and Europe?

    High.

    What can explicitly not be concluded from this study?

    That the remaining 56% of cancer deaths have no external cause (infections and UV were not modelled); individual risk for a given person.

    Scientific details →

Studies with mixed or unclear results (0)

No studies in this group.

Regional context

Germany / EU

Smoking is the leading preventable cause of death in Europe (general knowledge).

Egypt

Same evidence applies to Egypt; shisha and cigarettes both deliver tobacco smoke (general knowledge).

What applies in my country?

General scientific assessment

False Smoking is harmful at any level; it causes heart disease, stroke and cancer.

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. Low cigarette consumption and risk of coronary heart disease and stroke: meta-analysis of 141 cohort studies in 55 study reports.. Hackshaw A et al.. BMJ 2018 · PMID 29367388 · DOI 10.1136/bmj.j5855
  2. Mortality in relation to smoking: 50 years' observations on male British doctors.. Doll R et al.. BMJ 2004 · PMID 15213107 · DOI 10.1136/bmj.38142.554479.AE
  3. Proportion and number of cancer cases and deaths attributable to potentially modifiable risk factors in the United States, 2019.. Islami F et al.. CA Cancer J Clin 2024 · PMID 38990124 · DOI 10.3322/caac.21858
  4. The global burden of cancer attributable to risk factors, 2010-19: a systematic analysis for the Global Burden of Disease Study 2019.. GBD 2019 Cancer Risk Factors Collaborators. Lancet 2022 · PMID 35988567 · DOI 10.1016/S0140-6736(22)01438-6

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