Nezam El-Tayebat Fact CheckA scientific assessment of the “نظام الطيبات” nutrition system
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Potentially true True only under certain conditions Certainty of evidence: low provisional C-LIFE-05

Deep (slow) breathing is beneficial for health.

In short: This claim is possibly true. Slow breathing exercises modestly reduce stress and anxiety in trials, but rigorous trials found no effect on blood pressure, and there is no evidence that they prevent disease.
Conclusion: Slow breathing has plausible short-term benefits.
  1. Original statement
  2. Scientific assessment
  3. Scientific evidence in detail
  4. In plain language
  5. Studies on this claim
  6. Regional context
  7. What applies in my country?
  8. References

Original statement

وتنفّس عميق

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

Translation

Deep (slow) breathing is beneficial for health.

Origin

Source status
Archive editors
Attribution
Archive editors (homepage)
Origin
https://eltayebat.com/
Attribution uncertainty
Written by archive operators; not attributed to Elawady.
Population concerned

General

Geographic restriction by Elawady

none found

Scientific assessment

Potentially true – Some evidence points in favour of the statement, but it is not sufficient for a clear judgement.

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

1. What was claimed?

Deep breathing as part of healthy routine.

2. What is demonstrably correct?

Slow breathing increases heart-rate variability and is associated with relaxation and reduced anxiety in small studies (I-SYS-08).

3. What is wrong or exaggerated?

No evidence that it prevents or treats disease.

4. What remains unclear?

Long-term effects.

5. Which studies support it?

I-SYS-08.

6. Which studies contradict it?

None identified; the limitation is the absence of evidence on disease outcomes (I-SYS-08).

7. What applies to Germany and Europe?

Not region-specific; the same physiology and evidence apply.

8. What is known about Egypt?

Not region-specific; the same physiology and evidence apply.

9. What practical conclusion is appropriate?

A harmless relaxation technique.

Assessment details

Rationale for certainty of evidence

Small studies in healthy people show short-term autonomic and psychological effects; no hard outcomes.

Source quality

Archive editorial.

Regional transferability

High.

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

Scientific evidence in detail

True only under certain conditions – The claim holds only for certain doses, groups of people, preparations or circumstances.

Research question: Does slow/deep breathing benefit health?

Research question in detail (PICO)
Population
Adults
Intervention or exposure
Slow or deep breathing exercises
Comparison
No breathing practice; sham
Geographic scope
universal
Outcomes
  • Stress, anxiety, mood
  • Blood pressure

Study results as reported by the authors. Our assessment follows below.

What speaks for the claim?

What speaks against the claim?

What does the overall evidence say?

Editorial assessment based on the studies above – not itself a study result.

Which position is better supported?

Slow breathing has small-to-moderate short-term benefits on stress and mood and is low-risk; it has not been shown to lower blood pressure in rigorous trials or to prevent disease.

Why some studies weigh more

RCT meta-analyses on both sides; outcomes differ.

Is a causal relationship established? Probable RCT evidence for stress; null for BP.

Remaining uncertainty

Long-term health outcomes.

Justified conclusion

Possibly true for well-being; not for disease treatment.

Why do studies seem to disagree?

Positive (stress) and null (blood pressure) findings concern different outcomes; they do not conflict.

Does this depend on the country?
General biological effects
Universal.
Eating habits
Applies in Egypt.
Origin of the food
Not applicable.
Contaminants
Not applicable.
National production conditions
Not applicable.
Legal rules
Not applicable.
Actual monitoring data
No monitoring data relevant.

A regional difference that changes the conclusion is not supported by robust data.

Statistical re-check
  • CI symmetry – SBP 2.2 (-2.7 to 7.0), DBP 0.2 (-2.8 to 3.1) consistent. recalculated
Certainty of the overall evidence (GRADE, simplified)
Main outcome
Stress reduction with breathing exercises
Starting level
high (randomised trials)
Reasons for downgrading
  • risk of bias (self-report, unblinded)
  • inconsistency (I2 42%)
Result
low

Simplified assessment by a single reviewer, following the GRADE approach; not a formal GRADE panel. GRADE rates the body of evidence for one outcome, not individual studies.

Search strategy

Documented literature searches for this review (search strings in the original database syntax).

DatabaseDateSearchLooking forHitsIncluded
Europe PMC26 October 2026TITLE:(breathwork OR "slow breathing" OR "breathing exercises" OR "paced breathing") AND ("meta-analysis") AND (randomised OR randomized) AND (stress OR anxiety OR "blood pressure")supporting evidence49
Europe PMC26 October 2026TITLE:("device-guided breathing") AND (hypertension OR "blood pressure") AND ("meta-analysis" OR "systematic review")contradicting evidence5
Europe PMC26 October 2026("deep breathing" OR "slow breathing" OR "breathing exercises") AND (adverse OR harm OR "no effect" OR sham) AND ("randomized" OR "randomised") AND TITLE:(breathing)contradicting evidence735

How deeply was this checked?

3 linked studies: 0 checked in full text (0 of them with a structured risk-of-bias assessment), 3 on the basis of the abstract, 0 bibliographically only. No formal assessment with two independent reviewers and no independent human expert review has taken place yet.

Last scientific review: 26 October 2026

History of the verdict
  1. 25 October 2026 · Phase 1 · Initial assessment: Potentially true (low)
  2. 26 October 2026 · Phase 4 (systematic evidence review) · Re-examined with extended evidence; verdict unchanged: Potentially true (low)
    Supporting and limiting RCT syntheses added; verdict and certainty unchanged.
    New sources: I-LIFE-110 I-LIFE-111

In plain language

The archive recommends deep breathing. Small studies show that slow breathing can calm the body and mind for a while. There is no evidence that it prevents or cures diseases, but it is harmless.

Studies on this claim

Studies supporting the claim (2)

  • Slow breathing calms body and mind in short studies

    Zaccaro A et al.. Front Hum Neurosci 2018 · PMID 30245619 · DOI 10.3389/fnhum.2018.00353
    Systematic reviewindependent cross-checkabstract checked

    Small studies show more relaxation and heart-rate variability.

    Short-term relaxation effects

    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?

    Review slow-breathing effects.

    How was the study done?

    Systematic review.

    How many people, animals or samples were studied?

    15 studies.

    What was actually found?

    Relaxation effects.

    What do the results mean in everyday life?

    Breathing exercises are a harmless relaxation aid.

    What are the study's limitations?

    Small studies.

    What does it say about Elawady's specific claim?

    Partial support.

    Do the results apply to Germany and Europe?

    High.

    What can explicitly not be concluded from this study?

    Disease prevention or cure.

    Scientific details →

  • Breathing exercises and stress

    Fincham GW et al.. Sci Rep 2023 · PMID 36624160 · DOI 10.1038/s41598-022-27247-y
    Meta-analysisindependent cross-checkabstract checked★ key study

    Breathing exercises reduced stress, anxiety and low mood by a small to moderate amount.

    Breathwork reduced self-reported stress (g -0.35), anxiety and depressive symptoms.

    Does the study support the specific claim? Yes · 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?

    Test breathwork for stress.

    How was the study done?

    Meta-analysis of RCTs.

    How many people, animals or samples were studied?

    785 adults (stress outcome).

    What was actually found?

    g -0.35 for stress.

    How large was the observed effect?

    g -0.35 (-0.55 to -0.14).

    What do the results mean in everyday life?

    Slow breathing can help you feel calmer.

    What are the study's limitations?

    Self-report; unblinded.

    What does it say about Elawady's specific claim?

    Supports a modest benefit.

    Do the results apply to Germany and Europe?

    Applies; same physiology.

    What can explicitly not be concluded from this study?

    Effects on physical disease.

    Scientific details →

Studies contradicting or limiting the claim (1)

  • Slow-breathing devices for high blood pressure

    Landman GW et al.. JAMA Intern Med 2014 · PMID 25222103 · DOI 10.1001/jamainternmed.2014.4336
    Meta-analysisindependent cross-checkabstract checked★ key study

    When compared fairly with sham devices or music, slow-breathing devices did not lower blood pressure.

    In blinded active-controlled trials, device-guided slow breathing did not lower blood pressure.

    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?

    Test DGB for hypertension.

    How was the study done?

    IPD meta-analysis of blinded trials.

    How many people, animals or samples were studied?

    3 trials with IPD.

    What was actually found?

    No BP reduction.

    How large was the observed effect?

    SBP +2.2 mmHg (-2.7 to 7.0) favouring control.

    What do the results mean in everyday life?

    Breathing exercises relax, but do not replace blood pressure treatment.

    What are the study's limitations?

    Few trials.

    What does it say about Elawady's specific claim?

    Limits 'beneficial for health' to well-being.

    Do the results apply to Germany and Europe?

    Applies; same physiology.

    What can explicitly not be concluded from this study?

    Effects of other breathing techniques.

    Scientific details →

Studies with mixed or unclear results (0)

No studies in this group.

Regional context

Germany / EU

Not region-specific; the same physiology and evidence apply.

Egypt

Not region-specific; the same physiology and evidence apply.

What applies in my country?

General scientific assessment

Potentially true Slow breathing has plausible short-term benefits.

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. How Breath-Control Can Change Your Life: A Systematic Review on Psycho-Physiological Correlates of Slow Breathing.. Zaccaro A et al.. Front Hum Neurosci 2018 · PMID 30245619 · DOI 10.3389/fnhum.2018.00353
  2. Effect of breathwork on stress and mental health: A meta-analysis of randomised-controlled trials.. Fincham GW et al.. Sci Rep 2023 · PMID 36624160 · DOI 10.1038/s41598-022-27247-y
  3. Efficacy of device-guided breathing for hypertension in blinded, randomized, active-controlled trials: a meta-analysis of individual patient data.. Landman GW et al.. JAMA Intern Med 2014 · PMID 25222103 · DOI 10.1001/jamainternmed.2014.4336

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