Nezam El-Tayebat Fact CheckA scientific assessment of the “نظام الطيبات” nutrition system
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Mostly true Certainty of evidence: moderate provisional C-BAR-06

Bariatric surgery causes measurable hip and spine bone loss (and fracture risk).

Conclusion: Mostly correct, especially for gastric bypass; less clear for sleeve.
  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

يُضاف إلى ذلك خسارة عظمية مؤكدة

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

Translation

Bariatric surgery causes measurable hip and spine bone loss (and fracture risk).

Origin

Source status
Archive editors
Attribution
Archive editors (eltayebat.com); not necessarily Elawady's own words
Origin
https://eltayebat.com/rule/bariatric-surgery/
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

Weight loss, malabsorption, hormonal change.

Claimed health effect

Bone loss, fractures.

Population concerned

Bariatric patients

Geographic restriction by Elawady

not applicable

Scientific assessment

Mostly true – Correct at its core, but with limitations or minor inaccuracies.

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

1. What was claimed?

Hip and spine bone loss.

2. What is demonstrably correct?

Spine bone loss in the first year after RYGB (about -3.3%) is confirmed by two methods (A-BAR-18); lower hip BMD and poorer microarchitecture 10+ years after RYGB vs BMI-matched controls (A-BAR-19); fracture risk increased: RR 1.38 (I-BAR-07), HR 1.26-1.32 after bypass (I-BAR-08); more fractures in ARMMS-T2D (I-BAR-02).

3. What is wrong or exaggerated?

Hip loss on DXA in the first year was not confirmed by QCT (A-BAR-18); the archive-cited UK study found no significant fracture increase at 2.2 years (A-BAR-17); procedure-specific (banding no effect; sleeve inconclusive in I-BAR-07).

4. What remains unclear?

Sleeve-specific fracture risk.

5. Which studies support it?

A-BAR-18, A-BAR-19, I-BAR-07, I-BAR-08.

6. Which studies contradict it?

A-BAR-17.

7. What applies to Germany and Europe?

Most key data are European (Sweden SOS/SOReg, Finland SLEEVEPASS, Switzerland SM-BOSS). European and international society guidelines consider bariatric surgery for severe obesity with lifelong follow-up.

8. What is known about Egypt?

No Egypt-specific outcome data were identified in this review. Elawady states in a transcript that sleeve gastrectomy is very widely performed in Egypt ('مصر كلها بتعملها'); the procedure-specific risks (reflux, deficiencies) apply wherever it is performed, and follow-up quality (supplements, endoscopy, mental-health screening) determines part of the risk.

9. What practical conclusion is appropriate?

Bone health monitoring is part of bariatric aftercare, especially after bypass.

Assessment details

Rationale for certainty of evidence

Consistent for RYGB/BPD; uncertain for sleeve; DXA measurement artifacts complicate hip data.

Source quality

Cohorts and imaging studies.

Regional transferability

European registries included.

Individual exceptions

Evidence strongest for bypass and biliopancreatic diversion; banding shows little effect.

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

In plain language

The archive says weight-loss surgery causes bone loss. This is largely correct for gastric bypass and similar operations: bone density falls and fractures become more frequent (about 25-40% more in large studies). For banding there was little effect, and for sleeve gastrectomy the evidence is still unclear. One study cited by the archive itself found no increase in fractures in the first two years.

Studies on this claim

Studies supporting the claim (4)

  • Bone after gastric bypass: depends on the scanner

    Yu EW et al.. J Bone Miner Res 2014 · PMID 23929784 · DOI 10.1002/jbmr.2063
    Cohort studycited by the Tayebat archiveabstract only checked

    Spine bone density fell about 3% in one year; hip loss seen on DXA was not confirmed by CT.

    Bariatric surgery causes measurable hip and spine bone loss (and fracture risk).

    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?

    Bone loss

    How was the study done?

    Prospective controlled

    How many people, animals or samples were studied?

    50

    What was actually found?

    Spine loss; hip uncertain

    How large was the observed effect?

    -3.3% spine

    What do the results mean in everyday life?

    Some bone loss is real

    What are the study's limitations?

    Small

    What does it say about Elawady's specific claim?

    Partly supports

    Do the results apply to Germany and Europe?

    Applicable

    What can explicitly not be concluded from this study?

    Fracture risk

    Scientific details →

  • Bones 10 years after bypass

    Lindeman KG et al.. J Bone Miner Res 2020 · PMID 32663365 · DOI 10.1002/jbmr.4112
    Cross-sectional studycited by the Tayebat archiveabstract only checked

    Bypass patients had weaker bone structure than people of the same weight; band patients did not.

    Bariatric surgery causes measurable hip and spine bone loss (and fracture risk).

    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?

    Long-term bone

    How was the study done?

    Cross-sectional

    How many people, animals or samples were studied?

    100

    What was actually found?

    RYGB deficits

    How large was the observed effect?

    see results

    What do the results mean in everyday life?

    Bypass may harm bone long-term

    What are the study's limitations?

    Small

    What does it say about Elawady's specific claim?

    Partly supports

    Do the results apply to Germany and Europe?

    Applicable

    What can explicitly not be concluded from this study?

    Sleeve effect

    Scientific details →

  • Fractures after weight-loss surgery in Quebec

    Rousseau C et al.. BMJ 2016 · PMID 27814663 · DOI 10.1136/bmj.i3794
    Case-control studyindependent cross-checkfull text checked★ key study

    Fractures were about 38% more frequent than in obese controls, clearly so only after biliopancreatic diversion.

    Bariatric surgery causes measurable hip and spine bone loss (and fracture risk).

    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?

    Fracture

    How was the study done?

    Nested case-control

    How many people, animals or samples were studied?

    177,464

    What was actually found?

    Higher risk

    How large was the observed effect?

    RR 1.38

    What do the results mean in everyday life?

    Bone health needs follow-up

    What are the study's limitations?

    Administrative data; controls not BMI-matched; short follow-up for sleeve; few bypass patients

    What does it say about Elawady's specific claim?

    Partly supports

    Do the results apply to Germany and Europe?

    Applicable

    What can explicitly not be concluded from this study?

    Sleeve-specific risk

    Scientific details →

  • Swedish study: fractures after gastric bypass

    Axelsson KF et al.. J Bone Miner Res 2018 · PMID 30011091 · DOI 10.1002/jbmr.3553
    Cohort studyindependent cross-checkabstract only checked

    Fracture risk was about 26-32% higher than in similar people without surgery.

    Bariatric surgery causes measurable hip and spine bone loss (and fracture risk).

    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?

    Fracture

    How was the study done?

    Matched cohort

    How many people, animals or samples were studied?

    ~78,000

    What was actually found?

    Higher risk

    How large was the observed effect?

    HR 1.26-1.32

    What do the results mean in everyday life?

    Bone protection is important after bypass

    What are the study's limitations?

    Short follow-up

    What does it say about Elawady's specific claim?

    Supports (bypass)

    Do the results apply to Germany and Europe?

    European

    What can explicitly not be concluded from this study?

    Sleeve risk

    Scientific details →

Studies contradicting or limiting the claim (1)

  • UK: fractures after weight-loss surgery

    Lalmohamed A et al.. BMJ 2012 · PMID 22867649 · DOI 10.1136/bmj.e5085
    Cohort studycited by the Tayebat archiveabstract only checked

    No significant increase in fractures in the first 2-3 years.

    Bariatric surgery causes measurable hip and spine bone loss (and fracture risk).

    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?

    Fracture

    How was the study done?

    Matched cohort

    How many people, animals or samples were studied?

    12,521

    What was actually found?

    No increase

    How large was the observed effect?

    RR 0.89

    What do the results mean in everyday life?

    Short-term reassuring

    What are the study's limitations?

    Short follow-up

    What does it say about Elawady's specific claim?

    Limits claim

    Do the results apply to Germany and Europe?

    European

    What can explicitly not be concluded from this study?

    Long-term risk

    Scientific details →

Studies with mixed or unclear results (1)

  • Diabetes 12 years after randomized surgery vs medicine

    Courcoulas AP et al.. JAMA 2024 · PMID 38411644 · DOI 10.1001/jama.2024.0318
    Randomised controlled trialindependent cross-checkabstract only checked★ key study

    Blood sugar control stayed better after surgery; full remission was uncommon in both groups but more frequent after surgery (12.7% vs 0%).

    Bariatric surgery causes measurable hip and spine bone loss (and fracture risk).

    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?

    Long-term T2D

    How was the study done?

    Pooled RCT follow-up

    How many people, animals or samples were studied?

    262

    What was actually found?

    Surgery better; remission declines

    How large was the observed effect?

    HbA1c -1.1% at 12 y

    What do the results mean in everyday life?

    Relapse is common, but surgery keeps an advantage

    What are the study's limitations?

    Crossover, small

    What does it say about Elawady's specific claim?

    Partly supports erosion; contradicts 'no benefit'

    Do the results apply to Germany and Europe?

    Applicable

    What can explicitly not be concluded from this study?

    Mortality

    Scientific details →

Regional context

Germany / EU

Most key data are European (Sweden SOS/SOReg, Finland SLEEVEPASS, Switzerland SM-BOSS). European and international society guidelines consider bariatric surgery for severe obesity with lifelong follow-up.

Egypt

No Egypt-specific outcome data were identified in this review. Elawady states in a transcript that sleeve gastrectomy is very widely performed in Egypt ('مصر كلها بتعملها'); the procedure-specific risks (reflux, deficiencies) apply wherever it is performed, and follow-up quality (supplements, endoscopy, mental-health screening) determines part of the risk.

What applies in my country?

General scientific assessment

Mostly true Mostly correct, especially for gastric bypass; less clear for sleeve.

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. Bone loss after bariatric surgery: discordant results between DXA and QCT bone density.. Yu EW et al.. J Bone Miner Res 2014 · PMID 23929784 · DOI 10.1002/jbmr.2063
  2. Bone Density and Trabecular Morphology at Least 10 Years After Gastric Bypass and Gastric Banding.. Lindeman KG et al.. J Bone Miner Res 2020 · PMID 32663365 · DOI 10.1002/jbmr.4112
  3. Change in fracture risk and fracture pattern after bariatric surgery: nested case-control study.. Rousseau C et al.. BMJ 2016 · PMID 27814663 · DOI 10.1136/bmj.i3794
  4. Fracture Risk After Gastric Bypass Surgery: A Retrospective Cohort Study.. Axelsson KF et al.. J Bone Miner Res 2018 · PMID 30011091 · DOI 10.1002/jbmr.3553
  5. Risk of fracture after bariatric surgery in the United Kingdom: population based, retrospective cohort study.. Lalmohamed A et al.. BMJ 2012 · PMID 22867649 · DOI 10.1136/bmj.e5085
  6. Long-Term Outcomes of Medical Management vs Bariatric Surgery in Type 2 Diabetes.. Courcoulas AP et al.. JAMA 2024 · PMID 38411644 · DOI 10.1001/jama.2024.0318

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