Natural wild sea fish is the cleanest food you can get; wild sea fish (including large predators such as grouper/hamour, tuna, and smoked mackerel) is allowed while farmed fish is forbidden.
Original statement
سمك البحر انظف حاجه ممكن توصل لها دلوقتي
verbatim according to source. Translation by the project; the Arabic wording is authoritative.
Translation
Natural wild sea fish is the cleanest food you can get; wild sea fish (including large predators such as grouper/hamour, tuna, and smoked mackerel) is allowed while farmed fish is forbidden.
Origin
- Source status
- Video transcript (own words)
- Attribution
- Elawady (machine transcript)
- Video
- Dr Diaa Al Awady د ضياء العوضي is live! الأكل وراء كل مشاكلك (Open source)
- Published
- 20 July 2025
- Timestamp
- 0:41:28 (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
Wild fish eat natural food.
- Claimed health effect
Wild sea fish is safe/clean.
- Population concerned
General population incl. children and pregnant women (no exceptions stated)
- Geographic restriction by Elawady
none found
Diverging source versions
سمك البحر مياس ومرجان وهامور وقروس والحاجات اللي بتاكل السمك دي تمشي خلاص تبقى مصطناره احسن حاجه
- Source status
- Video transcript (own words)
- Attribution
- Elawady (machine transcript)
- Video
- Dr Diaa Al Awady د ضياء العوضي is live! (Open source)
- Published
- 18 February 2026
- Timestamp
- 0:30:08 (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.
- Source status
- Archive food list
- Attribution
- Archive editors (eltayebat.com food list)
- Origin
- https://eltayebat.com/foods/
- Attribution uncertainty
- Archive food list: 'السمك البحري الطبيعي ✅ مسموح' and 'الأسماك المستزرعة ❌ تجنّب'. Not a verbatim Elawady quote.
- Source status
- Third-party site (unofficial)
- Attribution
- Third-party site altayybat.com (unofficial)
- Origin
- https://altayybat.com/ar/
- Attribution uncertainty
- Unofficial site. Lists 'جمبري وسبيط' as forbidden, but lists 'كابوريا' (crab) as allowed; says 'تجنب الجمبري والسبيط من بين المأكولات البحرية'.
بطارخ كل البطارخ ممنوعه خلاص اللي عايز ياكل رنجه بس حاجه نظيفه ياكلها اللي عايز ياكل مكر المدخن موجود منه في سعودي لقيت منه مكر المدخن ممتاز تحط عليه زيت وشويه خل وتاكله بالتوست
Fish roe: all fish roe is forbidden. Whoever wants to eat herring - just something clean - can eat it. Whoever wants smoked mackerel: it is available in Saudi Arabia, I found excellent smoked mackerel; you put oil and a little vinegar on it and eat it with toast.
- Source status
- Video transcript (own words)
- Attribution
- Elawady (machine transcript)
- Video
- Dr Diaa Al Awady د ضياء العوضي is live! الهرم الغذائي الجديده (Open source)
- Published
- 20 January 2026
- Timestamp
- 0:33:24 (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); no timestamps; wording may contain speech-recognition errors; speaker turns are not marked, the excerpt was judged to be Elawady's own speech from context.
Scientific assessment
Mostly false – Essential parts of the statement are not supported by the evidence or are strongly exaggerated.
Certainty of evidence: moderate – Further research may still affect the assessment.
1. What was claimed?
Wild sea fish is the cleanest food; any sea fish that eats other fish is fine.
2. What is demonstrably correct?
Eating fish 1-2 (adults up to 3-4) servings per week is associated with benefits (EFSA 2015 statement, I-FSH-21; I-FSH-03, I-FSH-04). Allowing wild sea fish is compatible with mainstream advice.
3. What is wrong or exaggerated?
The rule ignores the main contaminant risk of wild fish: methylmercury accumulates in large, long-lived predatory fish. EFSA set a TWI of 1.3 µg/kg bw for methylmercury and named tuna, swordfish, cod, whiting and pike as the main contributors in Europe (I-FSH-20); for high-mercury species, few servings reach the TWI, and EFSA advises toddlers, children and women of childbearing age to increase consumption of species low in methylmercury (I-FSH-21). He explicitly recommends 'fish that eat fish' (predators) and grouper (هامور). In Egyptian market fish (mullet, sardine, mackerel), 9-20% of samples exceeded mercury limits and the THQ for mercury (and, based on total arsenic, for arsenic) exceeded 1 (I-FSH-14); the mackerel was imported frozen and the wild or farmed origin of the mullet is not documented, and the arsenic cancer-risk values are based on total arsenic, which the authors say substantially overestimates risk. A North-African meta-analysis flagged Hg and Cd concerns for Egypt (I-FSH-15). Wild Atlantic salmon had higher dioxins, PCBs and mercury than farmed (I-FSH-02). The archive itself cites a review concluding farmed fish are 'safer than fish in nature' for mercury (A-FSH-20). EFSA also identifies fish meat as a main dietary source of PFAS, with the highest PFOS in freshwater species such as carp, eel, perch and roach and in sardine, and low levels in salmon and trout; it does not compare farmed and wild fish (I-FSH-18, I-FSH-19).
4. What remains unclear?
Mercury levels of the specific species he names (hamour, morgan, mayyas) in Egyptian markets were not found in the sources read.
5. Which studies support it?
I-FSH-21, I-FSH-03, I-FSH-04 (benefit of fish in general).
6. Which studies contradict it?
I-FSH-20, I-FSH-21, I-FSH-14 (mercury and lead; origin of samples not wild-vs-farmed), I-FSH-15, I-FSH-02, A-FSH-20, I-FSH-05, I-FSH-18 and I-FSH-19 (PFAS; wild fish not exempt, no farmed-wild comparison).
7. What applies to Germany and Europe?
EU sets maximum levels for mercury in fish; EFSA advises vulnerable groups to choose low-mercury species (I-FSH-21).
8. What is known about Egypt?
Egyptian studies report mercury and other metal exceedances in some marine market fish (I-FSH-14, I-FSH-15); local monitoring matters.
9. What practical conclusion is appropriate?
Eat fish regularly, vary species, and - especially in pregnancy and for children - limit large predatory fish (e.g. tuna, swordfish, shark, large grouper).
Assessment details
- Rationale for certainty of evidence
EFSA identifies wild predatory species (tuna, swordfish, pike, hake) as main methylmercury sources; Egyptian market studies of marine fish found mercury, arsenic and lead exceedances. Wild fish also carry persistent pollutants (I-FSH-02). Fish consumption overall is beneficial, so the allowance of wild sea fish is not itself harmful; the error is the implied assumption that 'wild = clean'.
- Source quality
Machine transcript; archive food list.
- Regional transferability
Mercury in large predators is a global issue; local data for Egypt exist.
- Individual exceptions
Pregnant women, women planning pregnancy, and young children are the groups most sensitive to methylmercury.
- Regional scope of the claim
- not specified
- Last reviewed
- 25 October 2026 provisional
In plain language
Dr Elawady calls wild sea fish the cleanest food and even recommends fish that eat other fish, like grouper. Eating fish is generally healthy. But large predatory sea fish accumulate methylmercury, which can harm a baby's developing brain. EFSA advises children and women who may become pregnant to choose fish low in mercury. Egyptian studies found too much mercury in a part of the market fish tested. So 'wild' does not automatically mean 'clean'.
Studies on this claim
Studies supporting the claim (3)
-
EFSA: fish benefits vs mercury (2015)
EFSA Scientific Committee. EFSA J / EFSA press release 2015 · DOI 10.2903/j.efsa.2015.3982Risk assessmentindependent cross-checkabstract only checked★ key studyEating fish 1-4 times a week brings benefits; children and women of childbearing age should choose low-mercury species.
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?
Balance benefits and risks.
- How was the study done?
Scenario analysis.
- How many people, animals or samples were studied?
EU countries.
- What was actually found?
Benefits at 1-4 servings/week; MeHg TWI reached by some children.
- What do the results mean in everyday life?
Eat fish, choose low-mercury species.
- What are the study's limitations?
Press release.
- What does it say about Elawady's specific claim?
Supports fish, limits predators.
- Do the results apply to Germany and Europe?
High.
-
Fish: benefits vs contaminant risks (2006)
Mozaffarian D & Rimm EB. JAMA 2006 · PMID 17047219 · DOI 10.1001/jama.296.15.1885Systematic reviewindependent cross-checkabstract only checked★ key studyFor adults, the benefits of eating fish 1-2 times a week outweigh risks from contaminants.
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?
Weigh benefits and risks.
- How was the study done?
Review/meta-analysis.
- How many people, animals or samples were studied?
Many studies.
- What was actually found?
Benefits > risks.
- How large was the observed effect?
Coronary death -36%.
- What do the results mean in everyday life?
Eat fish, vary species.
- What are the study's limitations?
Mostly observational.
- What does it say about Elawady's specific claim?
Contradicts 'avoid farmed salmon'.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Species-specific risks for every fish.
-
Fish in pregnancy and child development
Hibbeln JR et al.. Lancet 2007 · PMID 17307104 · DOI 10.1016/S0140-6736(07)60277-3Cohort studyindependent cross-checkabstract only checkedChildren of mothers who ate more seafood in pregnancy had better developmental scores.
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?
Link seafood to development.
- How was the study done?
Cohort.
- How many people, animals or samples were studied?
11,875.
- What was actually found?
Better outcomes with >340 g/week.
- How large was the observed effect?
OR 1.48 for no seafood.
- What do the results mean in everyday life?
Fish in pregnancy helpful; choose low-mercury species.
- What are the study's limitations?
Observational.
- What does it say about Elawady's specific claim?
Supports fish intake in general.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Species-level safety.
No study in this group is marked as key.
Studies contradicting or limiting the claim (7)
-
EFSA: mercury in food (2012)
EFSA CONTAM Panel. EFSA J / EFSA press release 2012 · DOI 10.2903/j.efsa.2012.2985Risk assessmentindependent cross-checkabstract only checked★ key studyEFSA set a weekly safety limit for methylmercury; tuna, swordfish and pike are among the main sources.
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?
Set safe intakes.
- How was the study done?
Risk assessment.
- How many people, animals or samples were studied?
EU data.
- What was actually found?
TWI 1.3 µg/kg bw.
- How large was the observed effect?
High consumers ~2x exposure.
- What do the results mean in everyday life?
Large predatory fish carry mercury.
- What are the study's limitations?
Press release only.
- What does it say about Elawady's specific claim?
Contradicts 'wild = clean'.
- Do the results apply to Germany and Europe?
High.
-
Metals in Egyptian market sea fish (2023-2024)
Elshebrawy HA et al.. Sci Rep 2026 · PMID 42632867 · DOI 10.1038/s41598-026-67201-wMeasurement / residue studyindependent cross-checkfull text checked★ key studyUp to a fifth of mullet, sardine and mackerel samples exceeded mercury limits; heavy eaters could exceed safe intake for mercury and lead (arsenic risk is probably overestimated).
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?
Measure metals.
- How was the study done?
AAS.
- How many people, animals or samples were studied?
250 fish.
- What was actually found?
Mercury above limits in 9-20% of samples, lead in 20-58%; mercury intake from mullet slightly above the tolerable level (111%) even at average consumption.
- How large was the observed effect?
THQ > 1 for Hg, As.
- What do the results mean in everyday life?
Sea fish is not automatically clean.
- What are the study's limitations?
Total arsenic only (overestimates cancer risk); raw fish; one city; wild/farmed origin unknown; mackerel imported from Norway/Netherlands.
- What does it say about Elawady's specific claim?
Contradicts 'wild sea fish is cleanest'.
- Do the results apply to Germany and Europe?
Low.
- What can explicitly not be concluded from this study?
Health outcomes; differences between farmed and wild fish.
-
Toxic metals in North African seafood (meta-analysis)
Nahal A & Mehouel F. Regul Toxicol Pharmacol 2026 · PMID 42250752 · DOI 10.1016/j.yrtph.2026.106156Meta-analysisindependent cross-checkabstract only checkedMercury and cadmium in seafood signalled potential concern in Egypt and Tunisia.
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?
Pool data.
- How was the study done?
Meta-analysis.
- How many people, animals or samples were studied?
45 studies.
- What was actually found?
Hg/Cd concern.
- How large was the observed effect?
Hg 0.29 mg/kg pooled.
- What do the results mean in everyday life?
Monitor seafood.
- What are the study's limitations?
Heterogeneous.
- What does it say about Elawady's specific claim?
Contradicts 'sea fish is cleanest'.
- Do the results apply to Germany and Europe?
Low.
-
Wild vs farmed Atlantic salmon (Norway 2017)
Lundebye AK et al.. Environ Res 2017 · PMID 28189073 · DOI 10.1016/j.envres.2017.01.026Measurement / residue studyindependent cross-checkabstract only checked★ key studyWild salmon had more dioxins, PCBs and mercury than farmed salmon; both were good omega-3 sources.
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?
Compare same species.
- How was the study done?
Chemical analysis.
- How many people, animals or samples were studied?
Wild and farmed Atlantic salmon.
- What was actually found?
Farmed lower in most contaminants.
- How large was the observed effect?
3.2 g vs 2.8 g EPA+DHA per 200 g.
- What do the results mean in everyday life?
Farmed salmon is not more polluted.
- What are the study's limitations?
Details not in abstract.
- What does it say about Elawady's specific claim?
Contradicts 'farmed is more polluted'.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Other farmed species.
-
Mercury in farmed fish (review 2025)
de Oliveira Novaes E et al.. Biol Trace Elem Res 2025 · PMID 39715977 · DOI 10.1007/s12011-024-04493-xSystematic reviewcited by the Tayebat archiveabstract only checkedFarmed fish had low mercury and were judged safer than wild fish.
Does the study support the specific claim? No · 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 Hg in farmed fish.
- How was the study done?
Systematic review.
- How many people, animals or samples were studied?
18 studies.
- What was actually found?
Low Hg.
- What do the results mean in everyday life?
Farmed fish lower in mercury.
- What are the study's limitations?
Few studies.
- What does it say about Elawady's specific claim?
Contradicts claim.
- Do the results apply to Germany and Europe?
Moderate.
-
EFSA: PFAS in food (2020)
EFSA Panel on Contaminants in the Food Chain (EFSA CONTAM Panel) et al.. EFSA J 2020 · PMID 32994824 · DOI 10.2903/j.efsa.2020.6223Risk assessmentindependent cross-checkfull text checkedFish meat, fruit and eggs were the main dietary PFAS sources; EFSA set a weekly limit of 4.4 ng/kg body weight, which parts of the population exceed. Freshwater fish such as eel had the highest levels; salmon/trout were low.
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?
Set safe intake.
- How was the study done?
EFSA risk assessment (BMD and PBPK modelling; EU occurrence data).
- How many people, animals or samples were studied?
69,433 food analytical results from 16 European countries.
- What was actually found?
TWI 4.4 ng/kg bw/week; adults' average exposure up to 5 times and high exposure up to 16 times the TWI (lower-bound estimates); fish meat a main source.
- What do the results mean in everyday life?
Fish is a PFAS source regardless of farming.
- What are the study's limitations?
92% of results below detection; most data from three countries; based on one critical human study.
- What does it say about Elawady's specific claim?
Context.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Whether farmed or wild fish contain more PFAS; individual health risk.
-
EFSA: PFOS and PFOA (2018)
EFSA Panel on Contaminants in the Food Chain (CONTAM) et al.. EFSA J 2018 · PMID 32625773 · DOI 10.2903/j.efsa.2018.5194Risk assessmentindependent cross-checkfull text checkedFish and seafood were important dietary sources of PFOS and PFOA; many Europeans exceeded EFSA's 2018 weekly limits (13 and 6 ng/kg).
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?
Set safe intake.
- How was the study done?
EFSA risk assessment (BMD and PBPK modelling; EU occurrence data).
- How many people, animals or samples were studied?
20,019 results.
- What was actually found?
TWIs 13 (PFOS) and 6 (PFOA) ng/kg bw/week; high consumers exceed PFOS TWI up to 13-fold; fish meat contributed up to 79% of PFOS lower-bound exposure in the elderly.
- What do the results mean in everyday life?
Fish contributes PFAS.
- What are the study's limitations?
Superseded (2020); most data below detection; 62% from Germany.
- What does it say about Elawady's specific claim?
Context.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Farmed vs wild differences; individual health risk.
No study in this group is marked as key.
Studies with mixed or unclear results (1)
-
Health effects of low mercury exposure
Karagas MR et al.. Environ Health Perspect 2012 · PMID 22275730 · DOI 10.1289/ehp.1104494Narrative reviewindependent cross-checkfull text checkedMethylmercury is a nerve toxin; at low levels possible effects on babies' early development, unclear effects on heart and immune system.
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 low-level MeHg.
- How was the study done?
Narrative (non-systematic) review of studies measuring mercury in blood or hair.
- How many people, animals or samples were studied?
Several dozen studies; sample sizes from about 40 to 3,400.
- What was actually found?
Possible effects on fetal/infant growth and early childhood neurodevelopment; no clear pattern for heart disease; immune evidence too limited.
- What do the results mean in everyday life?
Pregnancy is the sensitive window.
- What are the study's limitations?
Not systematic; no quality assessment of studies; excludes high-exposure populations; literature to 2011.
- What does it say about Elawady's specific claim?
Mixed.
- Do the results apply to Germany and Europe?
Moderate.
- What can explicitly not be concluded from this study?
Effects in adults at low exposure; size of risk.
No study in this group is marked as key.
Regional context
Germany / EU
EU sets maximum levels for mercury in fish; EFSA advises vulnerable groups to choose low-mercury species (I-FSH-21).
Egypt
Egyptian studies report mercury and other metal exceedances in some marine market fish (I-FSH-14, I-FSH-15); local monitoring matters.
- Food-safety governance and official controls
- Pesticide residues in fruit and vegetables on the EU/German market (incl. imports from Egypt)
- Pesticide residues in produce sold on the Egyptian domestic market
- Antibiotic (veterinary drug) residues in poultry meat and eggs
- Antimicrobial use in food animals and antibiotic growth promoters
- Hormones in poultry, meat, milk and farmed fish
- Dioxins, PCBs and PFAS in eggs and other animal foods
- Aflatoxin M1 in milk and dairy products
- Aflatoxins in groundnuts (peanuts)
- Heavy metals in fish
- Farmed fish (aquaculture): drugs, water source and controls
- Import controls and the meaning of RASFF notifications for Egyptian products
What applies in my country?
General scientific assessment
Mostly false Recommending sea fish is reasonable, but the claim that wild sea fish is the 'cleanest' food ignores mercury in predatory fish.
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
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
- Statement on the benefits of fish/seafood consumption compared to the risks of methylmercury in fish/seafood (EFSA press release 'Fish: scenarios indicate benefits versus risks', 22 January 2015). EFSA Scientific Committee. EFSA J / EFSA press release 2015 · DOI 10.2903/j.efsa.2015.3982
- Fish intake, contaminants, and human health: evaluating the risks and the benefits.. Mozaffarian D & Rimm EB. JAMA 2006 · PMID 17047219 · DOI 10.1001/jama.296.15.1885
- Maternal seafood consumption in pregnancy and neurodevelopmental outcomes in childhood (ALSPAC study): an observational cohort study.. Hibbeln JR et al.. Lancet 2007 · PMID 17307104 · DOI 10.1016/S0140-6736(07)60277-3
- Scientific Opinion on the risk for public health related to the presence of mercury and methylmercury in food (EFSA press release: 'Mercury in food - EFSA updates advice on risks for public health', 20 December 2012). EFSA CONTAM Panel. EFSA J / EFSA press release 2012 · DOI 10.2903/j.efsa.2012.2985
- Carcinogenic and non-carcinogenic health risks associated with heavy metal exposure in commonly consumed marine fish in Egypt.. Elshebrawy HA et al.. Sci Rep 2026 · PMID 42632867 · DOI 10.1038/s41598-026-67201-w
- Toxic trace elements in fish and seafood from North African coasts: A systematic review and meta-analysis of contamination levels and health risk assessment.. Nahal A & Mehouel F. Regul Toxicol Pharmacol 2026 · PMID 42250752 · DOI 10.1016/j.yrtph.2026.106156
- Lower levels of Persistent Organic Pollutants, metals and the marine omega 3-fatty acid DHA in farmed compared to wild Atlantic salmon (Salmo salar).. Lundebye AK et al.. Environ Res 2017 · PMID 28189073 · DOI 10.1016/j.envres.2017.01.026
- Mercury Levels in the Worldwide Farmed Fish: A Systematic Review.. de Oliveira Novaes E et al.. Biol Trace Elem Res 2025 · PMID 39715977 · DOI 10.1007/s12011-024-04493-x
- Risk to human health related to the presence of perfluoroalkyl substances in food.. EFSA Panel on Contaminants in the Food Chain (EFSA CONTAM Panel) et al.. EFSA J 2020 · PMID 32994824 · DOI 10.2903/j.efsa.2020.6223
- Risk to human health related to the presence of perfluorooctane sulfonic acid and perfluorooctanoic acid in food.. EFSA Panel on Contaminants in the Food Chain (CONTAM) et al.. EFSA J 2018 · PMID 32625773 · DOI 10.2903/j.efsa.2018.5194
- Evidence on the human health effects of low-level methylmercury exposure.. Karagas MR et al.. Environ Health Perspect 2012 · PMID 22275730 · DOI 10.1289/ehp.1104494