Guideline / position statementindependent cross-checkfull text checked★ key study I-FSH-103 in-depth review
FDA/EPA fish advice for pregnancy and children
Advice about Eating Fish: For Those Who Might Become or Are Pregnant or Breastfeeding and Children Ages 1-11 Years (FDA/EPA joint advice, revised October 2021; page content current as of 03/05/2024)
Overview
US FDA and US EPA. FDA website 2021
Salmon, tilapia, sardines and shrimp are 'Best Choices'; grouper is limited to one serving a week; shark, swordfish, king mackerel and bigeye tuna should be avoided.
Does the study support the specific claim? No · Methodological quality: high
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Guide fish choice by mercury.
- How was the study done?
Classification of 62 fish types by mercury level.
- How many people, animals or samples were studied?
US market fish.
- What was actually found?
Three groups: Best Choices, Good Choices, Choices to Avoid.
- How large was the observed effect?
Not applicable.
- What do the results mean in everyday life?
In pregnancy, eat 2-3 servings of low-mercury fish a week.
- What are the study's limitations?
US data.
- What does it say about Elawady's specific claim?
Wild predators are not automatically safe; several farmed fish are low in mercury.
- Do the results apply to Germany and Europe?
Comparable to EFSA advice.
- What can explicitly not be concluded from this study?
Feed hygiene or residues other than mercury.
Scientific in-depth review
1. Full reference
- Authors
- US FDA and US EPA
- Journal
- FDA website
- Year
- 2021
- Identifier
- Verification
- verified – FDA page fetched 2026-10-26 (WebFetch); revision date and species lists read
- Retracted
- no
- Corrections
- none
- Extent checked
- full text
- Conflicts of interest and funding
US government
2. Research question
Which fish, and how much, should people who are or might become pregnant, who breastfeed, and children eat?
3. Study design and population
- Study design
- Guideline / position statement – Government consumption advice based on mercury levels
- Population
Pregnant or breastfeeding people, people who might become pregnant, children 1-11 years
- Country
USA
- Period
2021 (page current 2024)
- Sample size
62 fish types classified
4. Methods and endpoints
- Exposure / intervention
Fish species grouped by mercury level
- Endpoints
Methylmercury exposure; nutritional benefit
- Statistical methods
Not applicable
5. Actual results
- Results
Pregnancy/breastfeeding: 2 to 3 servings (4 oz each) a week from 'Best Choices' or 1 serving from 'Good Choices'. Children: 2 servings a week from 'Best Choices' (about 1-4 oz depending on age). Best Choices include salmon, tilapia, catfish, mullet, sardine, shrimp, squid, crab, Atlantic mackerel, cod and freshwater trout. Good Choices (1 serving a week, no other fish that week) include grouper, halibut, snapper, Spanish mackerel, albacore and yellowfin tuna. Choices to Avoid: king mackerel, marlin, orange roughy, shark, swordfish, tilefish (Gulf of Mexico), bigeye tuna.
- Absolute risks
not applicable
- Authors' conclusion
Eat a variety of fish from the lower-mercury groups.
6. Strengths
- Species-specific, official, current
7. Weaknesses
- Based on US market mercury data; the species mix in Egypt differs
8. Risk of bias
- Orienting tool
- none applicable
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- not assessable
- Rationale
Official advice.
9. Assessment of the statistical interpretation
10. Relevance to the specific claim
C-FSH-14: grouper limited to one serving a week, large predators to be avoided. C-FSH-13/C-FSH-12/C-FSH-15: salmon, tilapia, mullet, shrimp, squid and crab are 'Best Choices' (low mercury).
11. Independent contrary findings
12. Transferability to Germany and Europe
Moderate to high (same species biology; EFSA gives similar advice).
13. Overall methodological judgement
Directly contradicts 'any wild sea fish is clean' and, for mercury, the avoidance of farmed salmon and tilapia.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | high |
| Risk of bias | not assessable |
| Precision of results | not applicable |
| Directness | direct |
| Reproducibility | replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | moderate |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
15. Linked fact checks
- 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. – Studies contradicting or limiting the claim
- All salmon is farmed and salmon should not be eaten; sea bass, sea bream and similar fish should be eaten instead. – Studies contradicting or limiting the claim
- Farmed fish (e.g. tilapia, mullet) are forbidden because their food is not clean: they are fed poultry manure and poultry offal, and the waste of fish farms is in turn fed to cattle. – Studies contradicting or limiting the claim
- Shrimp, squid and crustaceans are forbidden because they are allergens for most people, are unsuitable for human consumption and are highly antigenic (provoke the immune system). – Studies contradicting or limiting the claim