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-ORG-11

Oophorectomy before menopause raises the risk of cognitive impairment or dementia (HR 1.46), more so the younger the age at surgery (Rocca 2007).

Conclusion: Association correctly reported and consistent.
  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

وروكا (Neurology 2007) ربط استئصال المبيضين قبل سن اليأس بزيادة خطر الخرف (HR 1.46).

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

Translation

Oophorectomy before menopause raises the risk of cognitive impairment or dementia (HR 1.46), more so the younger the age at surgery (Rocca 2007).

Origin

Source status
Archive editors
Attribution
Archive editors (eltayebat.com); not necessarily Elawady's own words
Origin
https://eltayebat.com/rule/unnecessary-organ-removal/
Attribution uncertainty
Editorial summary/narrative and study selection written by the archive operators; the archive states that the cited research documents harm independently of Dr. Diaa's words.
Claimed mechanism

Loss of estrogen neuroprotection.

Claimed health effect

Dementia.

Population concerned

Premenopausal women

Geographic restriction by Elawady

not applicable

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?

Premenopausal oophorectomy linked to dementia.

2. What is demonstrably correct?

HR 1.46 (1.13-1.90), with age gradient (A-ORG-14). A meta-analysis gives dementia HR 1.70 (1.07-2.69) for BSO before 45 (I-ORG-10), but this is based on two Mayo Clinic cohorts from the same group as Rocca 2007, is graded very low certainty, and the unstratified estimate was not significant (HR 1.36, 0.99-1.85); it is not an independent confirmation.

3. What is wrong or exaggerated?

Nothing substantial in the reporting; causality is not proven and the meta-analytic support is not independent of the original cohort.

4. What remains unclear?

Causality; role of estrogen therapy.

5. Which studies support it?

A-ORG-14; I-ORG-10 (partly, not independent).

6. Which studies contradict it?

None.

7. What applies to Germany and Europe?

Most cited cohorts are Scandinavian (Denmark, Sweden) and directly European; RCTs from the UK and Finland are directly transferable. Guidelines in Europe also emphasize defined indications (not verified here in detail).

8. What is known about Egypt?

No Egypt-specific data on rates or outcomes of tonsillectomy, cholecystectomy, hysterectomy, splenectomy or thyroid surgery were identified in this review.

9. What practical conclusion is appropriate?

A consideration when deciding about removing healthy ovaries before menopause.

Assessment details

Rationale for certainty of evidence

One population-based cohort shows the association; the meta-analysis (I-ORG-10) relies on cohorts from the same group, is graded very low certainty and is non-significant when unstratified; observational.

Source quality

Correctly reported.

Regional transferability

US data; applicable.

Individual exceptions

Effect may be reduced by estrogen therapy (A-ORG-15 for multimorbidity).

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

In plain language

The archive says that removing the ovaries before menopause increases the risk of dementia. A US study found a 46% higher risk of memory problems or dementia, higher with younger age at surgery, and a later meta-analysis found similar results. These are associations from observational studies, but they are consistent.

Studies on this claim

Studies supporting the claim (1)

  • Ovary removal before menopause and dementia

    Rocca WA et al.. Neurology 2007 · PMID 17761551 · DOI 10.1212/01.wnl.0000276984.19542.e6
    Cohort studycited by the Tayebat archiveabstract only checked★ key study

    Women who had ovaries removed before menopause had 46% higher risk of cognitive impairment or dementia later.

    Oophorectomy before menopause raises the risk of cognitive impairment or dementia (HR 1.46), more so the younger the age at surgery (Rocca 2

    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?

    Dementia

    How was the study done?

    Cohort

    How many people, animals or samples were studied?

    2961

    What was actually found?

    Higher risk

    How large was the observed effect?

    HR 1.46

    What do the results mean in everyday life?

    Possible brain cost of early ovary removal

    What are the study's limitations?

    Observational

    What does it say about Elawady's specific claim?

    Supports association

    Do the results apply to Germany and Europe?

    Applicable

    What can explicitly not be concluded from this study?

    Causation

    Scientific details →

Studies contradicting or limiting the claim (0)

No studies in this group.

Studies with mixed or unclear results (1)

  • Meta-analysis: removing ovaries at hysterectomy

    Hassan H et al.. Am J Obstet Gynecol 2024 · PMID 37364803 · DOI 10.1016/j.ajog.2023.06.043
    Meta-analysisindependent cross-checkfull text checked★ key study

    Linked to less breast cancer but more heart disease, dementia and other conditions in younger women; effect on death was inconsistent.

    Oophorectomy before menopause raises the risk of cognitive impairment or dementia (HR 1.46), more so the younger the age at surgery (Rocca 2

    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?

    BSO outcomes

    How was the study done?

    Meta-analysis

    How many people, animals or samples were studied?

    n/a

    What was actually found?

    Trade-offs

    How large was the observed effect?

    CVD HR 1.18; dementia HR 1.70

    What do the results mean in everyday life?

    Removing healthy ovaries in young women has costs and some benefits

    What are the study's limitations?

    Observational studies, few per outcome, fixed-effect pooling, no study-level risk-of-bias assessment

    What does it say about Elawady's specific claim?

    Supports risks; mortality unclear

    Do the results apply to Germany and Europe?

    Applicable

    What can explicitly not be concluded from this study?

    Causation; harm after age 50; absolute risk

    Scientific details →

Regional context

Germany / EU

Most cited cohorts are Scandinavian (Denmark, Sweden) and directly European; RCTs from the UK and Finland are directly transferable. Guidelines in Europe also emphasize defined indications (not verified here in detail).

Egypt

No Egypt-specific data on rates or outcomes of tonsillectomy, cholecystectomy, hysterectomy, splenectomy or thyroid surgery were identified in this review.

What applies in my country?

General scientific assessment

Mostly true Association correctly reported and consistent.

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. Increased risk of cognitive impairment or dementia in women who underwent oophorectomy before menopause.. Rocca WA et al.. Neurology 2007 · PMID 17761551 · DOI 10.1212/01.wnl.0000276984.19542.e6
  2. Long-term outcomes of hysterectomy with bilateral salpingo-oophorectomy: a systematic review and meta-analysis.. Hassan H et al.. Am J Obstet Gynecol 2024 · PMID 37364803 · DOI 10.1016/j.ajog.2023.06.043

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