Ultra-processed foods increase the risk of depression and common mental disorders.
Original statement
ترفع خطر ... الاكتئاب
not verbatim – paraphrase. Translation by the project; the Arabic wording is authoritative.
Translation
Ultra-processed foods increase the risk of depression and common mental disorders.
Origin
- Source status
- Archive editors
- Attribution
- Archive editors (study selection and narrative are the archive's, not necessarily Elawady's)
- Origin
- https://eltayebat.com/rule/ultra-processed-foods/
- Attribution uncertainty
- The archive homepage states that the forbidden-food section is supported by research 'independently of Dr. Diaa's words'. No evidence was found that Elawady himself cited these studies.
- Claimed mechanism
Not specified.
- Claimed health effect
Depression, anxiety, common mental disorders.
- Population concerned
Adults
- 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?
UPF causes depression.
2. What is demonstrably correct?
Adjibade 2019 (A-UPF-11): HR 1.21 (1.15-1.27) per 10% UPF for incident depressive symptoms; Lane 2024: OR 1.53 for common mental disorders (GRADE low).
3. What is wrong or exaggerated?
The 'class I' anxiety and common-mental-disorder results in Lane 2024 (A-UPF-13) come from cross-sectional studies of prevalent outcomes, where direction cannot be established; incident depression rests on two cohorts (1.22, 1.16-1.28; low GRADE). Causal wording ('increase the risk') is not justified; the evidence is associational and low certainty.
4. What remains unclear?
Direction of causality.
5. Which studies support it?
6. Which studies contradict it?
None specific.
7. What applies to Germany and Europe?
French cohort data applicable.
8. What is known about Egypt?
No Egypt data.
9. What practical conclusion is appropriate?
Plausible association; not a reason for diagnosis or treatment decisions.
Assessment details
- Rationale for certainty of evidence
Lane 2024: class I for prevalent anxiety and common mental disorders but GRADE low, largely cross-sectional data; one NutriNet-Santé cohort (HR 1.21 per 10%). Reverse causation (mood affecting diet) is plausible.
- Source quality
Archive cites appropriate studies; omits low GRADE ratings.
- Regional transferability
Moderate.
- Individual exceptions
Not applicable.
- Regional scope of the claim
- general (biological/medical)
- Last reviewed
- 26 October 2026 provisional
Scientific evidence in detail
Overinterpreted – A real finding exists, but the claim draws more from it than the data allow (e.g. association taken as cause, animal data applied to humans, small effect presented as large).
Research question: In adults, does higher UPF intake increase the risk of incident depression and common mental disorders?
Research question in detail (PECO)
- Population
- Adults
- Intervention or exposure
- Higher UPF intake
- Comparison
- Lower UPF intake
- Geographic scope
- universal biology
- Outcomes
- Incident depression
- Anxiety / common mental disorders
Study results as reported by the authors. Our assessment follows below.
What speaks for the claim?
Ultra-processed food and depression in US nurses
Samuthpongtorn C et al.. JAMA Netw Open 2023 · PMID 37728928 · DOI 10.1001/jamanetworkopen.2023.34770 Cohort studyfull text checkednewly addedNHS II: highest UPF quintile had more incident depression; lag analysis similar.
- Actual result
- HR 1.49 (1.26-1.76); lag HR 1.32 (1.13-1.54).
- Methodological quality
- moderate (cohort; full text read)
- Relevance
- direct
- Limitations
- Driven by artificial sweeteners.
Ultra-processed food and depressive symptoms
Adjibade M et al.. BMC Med 2019 · PMID 30982472 · DOI 10.1186/s12916-019-1312-y Cohort studyabstract checkedNutriNet-Sante: UPF associated with incident depressive symptoms.
- Actual result
- HR 1.21 (1.15-1.27) per 10%.
- Methodological quality
- moderate
- Relevance
- direct
What speaks against the claim?
No high-quality evidence against the claim was found.
What does the overall evidence say?
Editorial assessment based on the studies above – not itself a study result.
Which position is better supported?
A consistent association exists; causation is not established.
Why some studies weigh more
Prospective cohorts with lag analyses weigh more than cross-sectional data.
Is a causal relationship established? Possible, not established Reverse causation partly addressed by lag; residual confounding remains.
Remaining uncertainty
Direction; components (sweeteners).
Justified conclusion
Plausible association, not proven risk increase.
Does this depend on the country?
- General biological effects
- Biological mechanisms (energy density, eating rate, additives) are universal.
- Eating habits
- Mostly European and US diets studied; Egyptian UPF intake not quantified in the literature found (PubMed search: 2 hits, neither relevant).
- Origin of the food
- Not relevant.
- Contaminants
- Not relevant.
- National production conditions
- Product formulations differ by country.
- Legal rules
- No legal UPF category in EU or (as far as checked) Egypt.
- Actual monitoring data
- No Egyptian monitoring data.
A regional difference that changes the conclusion is not supported by robust data.
Statistical re-check
- Crude vs adjusted; table consistency – Crude rate ratio 1.50 vs HR 1.49; broad-definition case counts in table appear duplicated from strict definition. recalculated
Certainty of the overall evidence (GRADE, simplified)
- Main outcome
- Incident depression with UPF
- Starting level
- low (observational studies)
- Reasons for downgrading
- risk of bias (confounding)
- 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).
| Database | Date | Search | Looking for | Hits | Included |
|---|---|---|---|---|---|
| Europe PMC | 26 October 2026 | ("ultra-processed" OR "ultraprocessed") AND (TITLE:depression OR TITLE:depressive OR TITLE:"mental") AND PUB_YEAR:[2022 TO 2026] | supporting evidence | 341 | |
| Europe PMC | 26 October 2026 | ("ultra-processed" OR "ultraprocessed") AND (TITLE:depression OR TITLE:depressive) AND ("reverse causation" OR "bidirectional" OR "Mendelian randomization") | contradicting evidence | 88 |
How deeply was this checked?
4 linked studies: 2 checked in full text (1 of them with a structured risk-of-bias assessment), 2 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
- 25 October 2026 · Phase 1 · Initial assessment: Potentially true (low)
- 26 October 2026 · Phase 4 (systematic evidence review) · Re-examined with extended evidence; verdict unchanged: Potentially true (low)
New cohort consistent with prior evidence.
New sources: I-UPF-109
In plain language
People who eat more ultra-processed food report more depression and anxiety in several studies. Much of this comes from one-time surveys, where it is unclear whether diet affects mood or mood affects diet. The link is possible but not proven.
Studies on this claim
Studies supporting the claim (3)
-
Ultra-processed food and depressive symptoms
Adjibade M et al.. BMC Med 2019 · PMID 30982472 · DOI 10.1186/s12916-019-1312-yCohort studycited by the Tayebat archiveabstract checkedEach 10% more ultra-processed food: 21% more new 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?
Is %UPF associated with incident depressive symptoms?
- How was the study done?
Prospective cohort; CES-D.
- How many people, animals or samples were studied?
26,730 (20,380 women + 6,350 men); 2,221 cases; Adults 18-86 without depressive symptoms at baseline
- What was actually found?
HR 1.21 (1.15-1.27) per 10% UPF; significant only for beverages and sauces/added fats subgroups.
- How large was the observed effect?
HR 1.21 (1.15-1.27)
- What do the results mean in everyday life?
Association.
- What are the study's limitations?
Symptom scale, not diagnosis; NOVA misclassification possible; Residual confounding; Self-reported diet
- What does it say about Elawady's specific claim?
Supports C-UPF-04.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Causation.
-
Umbrella review: ultra-processed food and health
Lane MM et al.. BMJ 2024 · PMID 38418082 · DOI 10.1136/bmj-2023-077310Systematic reviewcited by the Tayebat archivefull text, structured risk-of-bias assessment★ key studyUPF was linked to 32 of 45 health outcomes; certainty was mostly low.
Does the study support the specific claim? Partly · 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?
What is the credibility of associations between UPF and health outcomes?
- How was the study done?
Umbrella review of 45 pooled analyses with credibility classes and GRADE.
- How many people, animals or samples were studied?
45 pooled analyses; n=9,888,373; Pooled populations
- What was actually found?
Class I: CVD mortality RR 1.50 (1.37-1.63; GRADE very low); T2D dose-response RR 1.12 (1.11-1.13; moderate); prevalent anxiety OR 1.48 (low); common mental disorders OR 1.53 (low). Class II: all-cause mortality RR 1.21 (low), heart-disease mortality HR 1.66 (low), T2D OR 1.40 (very low), depression HR 1.22 (low), sleep OR 1.41, wheezing RR 1.40, obesity OR 1.55 (low). GRADE overall: 22 low, 19 very low, 4 moderate.
- How large was the observed effect?
CVD mortality RR 1.50; T2D 1.12 per dose
- What do the results mean in everyday life?
Consistent links, low certainty.
- What are the study's limitations?
All the studies behind it are observational; many results rest on only 2-4 studies; for most outcomes the certainty is low or very low; the mental-health results come mainly from one-time surveys that cannot show what came first.
- What does it say about Elawady's specific claim?
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Causation.
-
Ultra-processed food and depression in US nurses
Samuthpongtorn C et al.. JAMA Netw Open 2023 · PMID 37728928 · DOI 10.1001/jamanetworkopen.2023.34770Cohort studyindependent cross-checkfull text checkedWomen eating the most ultra-processed food had about 50% more new depression; the link was mainly with artificial sweeteners.
HR 1.49 for depression (highest vs lowest UPF quintile); lag analysis HR 1.32; driven by sweeteners.
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?
To test UPF and later depression.
- How was the study done?
Cohort study with repeated diet surveys.
- How many people, animals or samples were studied?
31,712 middle-aged women.
- What was actually found?
More depression with high UPF, especially sweetened drinks.
- How large was the observed effect?
HR 1.49 (1.26-1.76).
- What do the results mean in everyday life?
Diet and mood may be linked; cause is unclear.
- What are the study's limitations?
Observational; self-reported diagnosis.
- What does it say about Elawady's specific claim?
Supports the association in C-UPF-04.
- Do the results apply to Germany and Europe?
Moderate.
- What can explicitly not be concluded from this study?
Cannot prove UPF causes depression.
No study in this group is marked as key.
Studies contradicting or limiting the claim (0)
No studies in this group.
Studies with mixed or unclear results (1)
-
Ultra-processed food and health: meta-analysis
Pagliai G et al.. Br J Nutr 2021 · PMID 32792031 · DOI 10.1017/S0007114520002688Meta-analysiscited by the Tayebat archiveabstract checkedHighest consumers had 25% higher death risk and 29% higher CVD risk in cohorts.
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?
Is UPF associated with health status?
- How was the study done?
Systematic review and meta-analysis of cross-sectional and cohort studies.
- How many people, animals or samples were studied?
23 studies (10 cross-sectional, 13 cohorts; 183,491 in cohorts); Adults
- What was actually found?
Cohorts: all-cause mortality RR 1.25 (1.14-1.37); CVD 1.29 (1.12-1.48); cerebrovascular 1.34 (1.07-1.68); depression 1.20 (1.03-1.40). Cross-sectional: overweight/obesity +39%, low HDL +102%, metabolic syndrome +79%.
- How large was the observed effect?
RR 1.25 mortality
- What do the results mean in everyday life?
Association.
- What are the study's limitations?
Few studies per outcome
- What does it say about Elawady's specific claim?
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Causation.
No study in this group is marked as key.
Regional context
Germany / EU
French cohort data applicable.
Egypt
No Egypt data.
What applies in my country?
General scientific assessment
Potentially true A plausible but low-certainty association.
The following areas of food safety are relevant to this statement:
- Additives and processing
- Controls, imports, recalls, labelling
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
- Prospective association between ultra-processed food consumption and incident depressive symptoms in the French NutriNet-Santé cohort.. Adjibade M et al.. BMC Med 2019 · PMID 30982472 · DOI 10.1186/s12916-019-1312-y
- Ultra-processed food exposure and adverse health outcomes: umbrella review of epidemiological meta-analyses.. Lane MM et al.. BMJ 2024 · PMID 38418082 · DOI 10.1136/bmj-2023-077310
- Consumption of Ultraprocessed Food and Risk of Depression.. Samuthpongtorn C et al.. JAMA Netw Open 2023 · PMID 37728928 · DOI 10.1001/jamanetworkopen.2023.34770
- Consumption of ultra-processed foods and health status: a systematic review and meta-analysis.. Pagliai G et al.. Br J Nutr 2021 · PMID 32792031 · DOI 10.1017/S0007114520002688