Mostly true Certainty of evidence: moderate provisional C-RES-05

Antibiotics were (and are) used in poultry production to make chickens grow faster.

Conclusion: Historically correct; banned in the EU since 2006.

Original statement

كبر لك الفراخ بالمضادات الحيويه فهو عارف يكبر فرخه من 10 جرام كتكوت خلاها فرخه 3 كيلو في 40 يوم

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

Translation

Antibiotics were (and are) used in poultry production to make chickens grow faster.

Origin

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr Diaa Al Awady د ضياء العوضي is live!لايف بصراحة (Open source)
Published
27 January 2026
Timestamp
0:59:35 (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); wording may contain transcription errors; no timestamps; 'published' is the date listed by the archive. Passage read in context.
Claimed mechanism

Microbiome-mediated growth promotion.

Claimed health effect

Faster growth of chickens.

Geographic restriction by Elawady

none found

Diverging source versions

المضاد الحيوي والكيماوي بيزود العيان وزن

Source status
Video transcript (own words)
Attribution
Elawady (machine transcript)
Video
Dr Diaa Al Awady د ضياء العوضي is live! الموت المفاجيء (Open source)
Published
14 July 2025
Timestamp
0:27:05 (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); wording may contain transcription errors; no timestamps; 'published' is the date listed by the archive. Passage read in context.

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?

Antibiotics make chickens grow.

2. What is demonstrably correct?

Antibiotics were authorised as feed additives in the EU until 31 December 2005 and then banned (I-RES-04). Cox et al. describe the growth-promoting effect of low-dose antibiotics and reproduce it in mice (A-ABX-03).

3. What is wrong or exaggerated?

The implication that today's broiler growth is due to antibiotics is not supported for the EU, where growth promoters are banned. The fast growth of modern broilers is mainly the result of genetic selection: in a comparison of strains from 1957, 1978 and 2005 raised on the same modern feed, broiler growth increased by over 400% and feed conversion ratio fell by 50% (I-INTA-11). The figures in the video ('a 10-gram chick to a 3-kilogram bird in 40 days') were not checked against a source; the cited abstract does not report hatch weight.

4. What remains unclear?

Current growth-promoter use in Egypt.

5. Which studies support it?

I-RES-04, A-ABX-03.

6. Which studies contradict it?

I-INTA-11 (growth gains from genetic selection without antibiotics in the comparison).

7. What applies to Germany and Europe?

Banned since 2006.

8. What is known about Egypt?

Not verified.

9. What practical conclusion is appropriate?

Historically correct; not a description of current EU practice.

Assessment details

Rationale for certainty of evidence

Growth promotion with sub-therapeutic antibiotics is historically well established (it is why the EU banned the practice in 2006) and is the basis of the mouse model in A-ABX-03. However, the fast growth of modern broilers (about 40 days to slaughter weight) is mainly due to genetics and feed, not antibiotics (general animal science; no source fetched), and EU broilers have been raised without antibiotic growth promoters since 2006.

Source quality

Machine transcript.

Regional transferability

EU: banned since 2006; elsewhere practice varies.

Regional scope of the claim
not specified
Last reviewed
25 October 2026 provisional

In plain language

Dr Elawady says chickens were made to grow faster with antibiotics. This is historically correct: low doses of antibiotics were used for this purpose, which is why the EU banned the practice from 2006. Today, the fast growth of chickens mainly comes from breeding and feed.

Studies on this claim

Studies supporting the claim (2)

  • EU ban on antibiotic growth promoters

    European Parliament and Council. Official Journal of the EU 2003
    Guideline / position statementindependent cross-checkabstract only checked

    Since 1 January 2006, antibiotics may not be used as growth promoters in EU animal feed.

    Does the study support the specific claim? Unclear · 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?

    Ban growth promoters.

    How was the study done?

    Regulation.

    What was actually found?

    Ban from 2006.

    What do the results mean in everyday life?

    No legal antibiotic fattening in EU.

    What does it say about Elawady's specific claim?

    Context.

    Do the results apply to Germany and Europe?

    High.

    Scientific details →

  • Antibiotics, gut bacteria and fat in mice

    Cox LM et al.. Cell 2014 · PMID 25126780 · DOI 10.1016/j.cell.2014.05.052
    Animal studycited by the Tayebat archivefull text checked★ key study

    Low-dose penicillin early in life made mice fatter via their gut bacteria.

    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?

    Test causality in mice.

    How was the study done?

    Experiments, microbiota transfer.

    How many people, animals or samples were studied?

    Mouse groups of about 3-10 animals per experiment.

    What was actually found?

    Continuous low-dose penicillin early in life increased weight and fat in mice (effects differed by sex); germ-free mice given the altered gut bacteria gained fat faster.

    What do the results mean in everyday life?

    Shows a plausible mechanism.

    What are the study's limitations?

    Mouse model; tiny groups and many tests; continuous low dosing like farm growth promoters, unlike human treatment courses; effects inconsistent between sexes.

    What does it say about Elawady's specific claim?

    Mechanism only.

    What can explicitly not be concluded from this study?

    Human effect.

    Scientific details →

Studies contradicting or limiting the claim (1)

  • Why do modern chickens grow so fast?

    Zuidhof MJ et al.. Poultry science 2014 · PMID 25260522 · DOI 10.3382/ps.2014-04291
    Otherindependent cross-checkabstract only checked

    Modern broilers grew over four times faster than 1957 birds on the same feed, showing the role of breeding.

    Growth gains attributable to genetic selection.

    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?

    Broiler genetics and growth

    How was the study done?

    Strain comparison on identical diet

    How many people, animals or samples were studied?

    180 chicks per strain

    What was actually found?

    Growth +400% from 1957 to 2005

    How large was the observed effect?

    FCR -50%

    What do the results mean in everyday life?

    Fast growth is mostly bred into the birds

    What are the study's limitations?

    One experiment

    What does it say about Elawady's specific claim?

    Qualifies 'antibiotics make chickens grow' (C-RES-05)

    Do the results apply to Germany and Europe?

    High

    What can explicitly not be concluded from this study?

    Whether antibiotics are still used in Egypt

    Scientific details →

Studies with mixed or unclear results (0)

No studies in this group.

Regional context

Germany / EU

Banned since 2006.

Egypt

Not verified.

What applies in my country?

General scientific assessment

Mostly true Historically correct; banned in the EU since 2006.

The following areas of food safety are relevant to this statement:

  • Pesticides and pesticide residues
  • Veterinary medicines and antibiotics
  • Hormonal growth promoters
  • Contaminants (heavy metals, PFAS, PCBs, dioxins, nitrate)
  • Pathogens (Salmonella, Campylobacter, etc.)
  • Animal husbandry and feed
  • Controls, imports, recalls, labelling

Eggs · Poultry · Dairy · Fish and seafood · Red meat · Fruit and vegetables

Choose a country to see the checked information for it.

Limits: legal rules describe what is allowed, not what every single food contains. Measurement data come from samples and are meaningful only together with their method details.

Country of residence or purchase Compare with another country

References

  1. Regulation (EC) No 1831/2003 on additives for use in animal nutrition, Article 11. European Parliament and Council. Official Journal of the EU 2003
  2. Altering the intestinal microbiota during a critical developmental window has lasting metabolic consequences.. Cox LM et al.. Cell 2014 · PMID 25126780 · DOI 10.1016/j.cell.2014.05.052
  3. Growth, efficiency, and yield of commercial broilers from 1957, 1978, and 2005.. Zuidhof MJ et al.. Poultry science 2014 · PMID 25260522 · DOI 10.3382/ps.2014-04291

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