Methylmercury (MeHg) is the biomagnified organometallic form of mercury that dominates dietary exposure in populations consuming fish. Methylmercury is a known developmental neurotoxicant; the literature on fetal and early-childhood exposure is extensive and forms the basis of advisories in most jurisdictions. Large predatory fish (shark, swordfish, king mackerel, bigeye tuna, tilefish) and marine mammals are the principal food-system sources. The distinction between methylmercury and total mercury is maintained throughout this wiki because methylmercury drives the health interpretation in dietary contexts; see mercury, total for the companion page.
Ufelle & Barchowsky 2021 supports this species page with textbook-level context on aquatic methylation, biomagnification, gastrointestinal absorption, blood-brain-barrier and placental transfer, fecal elimination, neurotoxicity, and treatment strategies that interrupt enterohepatic cycling. It is a toxicology source, not a food occurrence dataset.
Toxicology
Methylmercury crosses the blood-brain barrier and the placenta. Fetal exposure during gestation produces developmental neurotoxicity at levels well below those that produce overt symptoms in adults; the historical reference cohorts in the Faroe Islands and Seychelles establish the developmental-exposure dose-response that anchors most regulatory advisories. Adult toxicity manifests as paresthesia, ataxia, visual-field constriction, and dysarthria; the threshold for chronic adult symptoms is substantially higher than the threshold for prenatal effects. Hair-mercury serves as a long-term biomarker of methylmercury exposure because methylmercury binds preferentially to cysteine residues in keratin.
Cardiovascular effects of methylmercury exposure are an active area of research; some cohort studies report associations between methylmercury exposure and cardiovascular endpoints, while others do not. The wiki does not yet take a synthesis position on cardiovascular MeHg endpoints pending dedicated ingest of the cardiovascular evidence base. See Ufelle & Barchowsky 2021 for the textbook-level toxicology context.
Dietary exposure routes
Methylmercury exposure in non-occupational populations is dominated by fish consumption. The hierarchy of MeHg concentration follows trophic level: large long-lived predatory fish (shark, swordfish, king mackerel, tilefish from the Gulf of Mexico, bigeye tuna) carry the highest MeHg loads because they bioaccumulate the metal over their lifespan from prey already carrying methylmercury. Smaller short-lived fin-fish (sardines, anchovies, herring, salmon, trout, tilapia) carry substantially less. Shellfish carry less methylmercury than fin-fish of similar size because of lower trophic position and shorter lifespan. Marine mammals (whales, seals) are exposed populations where they are part of the diet (subsistence fishing communities, indigenous diets), and the MeHg loads in these matrices are among the highest documented in any human-consumed food.
For per-species detail and the trophic-level rationale, see fish, freshwater fish, shark, and canned tuna. For the regulatory side, see the FDA methylmercury action level (1.0 ppm in fish, fda-methylmercury-fish-1-ppm when added) and the 915 Hg maximum levels for fishery products.
Regulatory and advisory framework
Regulatory instruments for methylmercury split into three classes. Maximum levels in food (binding) include the EU Reg. 2023/915 species-specific Hg maximum levels for fishery products (which the EU applies as total Hg with species-specific thresholds, on the assumption that the vast majority of mercury in fishery matrices is methylmercury) and Codex methylmercury maximum levels for fish. Action levels (nonbinding but enforcement-relevant) include the FDA action level of 1.0 ppm methylmercury in fish, established before methylmercury speciation testing was routine and applied as a total-mercury proxy in many contexts. Consumption advisories (nonbinding consumer guidance) include the FDA/EPA joint advice on fish consumption for pregnant women, women of childbearing age, and young children, which categorizes fish into best-choice, good-choice, and avoid tiers.
The Heavy Metal Index records methylmercury limits and total-mercury limits as separate values per the methodology speciation rule even when a regulatory instrument permits the total-Hg proxy. Where a source reports tHg in a matrix where MeHg dominates (most fin-fish, most shellfish), the value is admitted as MeHg-context evidence; where the source reports tHg in a matrix where inorganic Hg dominates (rice, some grains, some animal organs), the value is admitted as tHg evidence only and is not used as MeHg evidence.
Vulnerable populations
The dose-response between methylmercury exposure and developmental neurotoxicity makes the fetus, the breastfed infant, and the young child the principal at-risk populations. The FDA/EPA fish-consumption advisory targets pregnant women and women of childbearing age specifically because in-utero exposure is the most consequential exposure window. Frequent fish consumers (subsistence-fishing communities, sport-fishing populations targeting predatory fish, populations whose cultural diet includes marine mammals) are the populations whose chronic intake can approach or exceed the JECFA Provisional Tolerable Weekly Intake even when consuming “safe-tier” fish in normal serving sizes.
Microbiome
Gut microbiota influence methylmercury bioavailability through both methylation and demethylation activity in the intestinal lumen. The microbiome-MeHg interaction is an active research area; mechanism-level evidence is being routed to methylmercury-microbiome (pending) and the WikiBiome crosswalk is targeted for this material once the ingest reaches density.
Climate-driven enhancement of MeHg production
Climate change is reshaping MeHg production dynamics in freshwater systems. Wu et al. 2025 (PNAS) compiled approximately 13,000 fish mercury samples across 164 sampling sites in China spanning 2005 to 2020 and combined machine learning with climate scenario modeling to project MeHg concentrations in freshwater wild fish. Under both SSP2-4.5 and SSP5-8.5 pathways, national average MeHg in freshwater wild fish is projected to rise by approximately 60 percent by 2031 to 2060.
The dominant individual climate driver is increased solar radiation (approximately 53 percent contribution), which the authors attribute to enhanced photochemical methylation in aquatic systems. Maximum temperature exerts a negative influence in the far future (after 2070) under the high-emissions pathway, but the 2031 to 2060 window is dominated by the solar radiation channel. The mechanism, climate-driven enhancement of microbial and photochemical methylation, is not specific to China; it operates through fundamental aquatic biogeochemistry. However, the model is parameterized on Chinese data, and independent confirmation from non-Chinese watersheds would strengthen the projection substantially.
The present-day baseline from the same dataset establishes that freshwater wild fish carry MeHg concentrations 2.9 to 6.2 times higher than freshwater farmed fish across trophic classes, and 1.7 times higher than marine wild fish in the same trophic class. Mean MeHg in freshwater wild fish of typical adult size (40 ± 5 cm body length) was 30.9 µg/kg wet weight. Freshwater fish consumption accounted for 51 percent of China’s total fish MeHg intake in 2011.
The certification implication is that MeHg thresholds and fish-consumption advisories calibrated against historical fish Hg data are drawing on a baseline that is actively shifting. See climate-metals-tradeoffs for the convergent analysis with rice irrigation trade-offs, and subsistence-fishing-mehg-disparity for the equity dimension.
Biogeochemical mechanism of MeHg production
MeHg is produced from inorganic mercury (Hg²⁺) primarily by microbial methylation in anoxic environments: wetland sediments, peatlands, paddy soils, lake hypolimnia, and the digestive tracts of sediment-feeding invertebrates. The dominant methylating microorganisms are sulfate-reducing bacteria, iron-reducing bacteria, and certain methanogenic archaea, all of which encode the hgcA / hgcB gene pair that catalyzes the Hg²⁺-to-MeHg conversion. Seelen et al. 2023 (Nature Communications) demonstrates that dissolved organic matter thiol concentrations control MeHg bioavailability across the terrestrial-marine aquatic continuum — thiols compete with cellular uptake systems for Hg-binding, so high-thiol waters reduce MeHg bioaccumulation efficiency, while low-thiol systems amplify it.
Counteracting demethylation pathways operate in parallel. Photochemical demethylation in surface waters (UV-A and UV-B driven, peaking in clear oligotrophic lakes) removes MeHg from the water column. Microbial demethylation by mercury-resistant bacteria carrying the mer operon (encoding MerB and MerA) cleaves the C-Hg bond and reduces inorganic Hg²⁺ to volatile Hg⁰. Net MeHg accumulation in any system depends on the balance: high methylation rate plus low demethylation rate plus high bioavailability equals high biota MeHg burden.
Zhou et al. 2025 (Nature Communications) demonstrates that microbial communities in Chinese paddy soils can actively mitigate MeHg accumulation in rice when methylation-suppressing taxa are present, suggesting future microbiome-engineering approaches to rice MeHg control. Cui et al. 2022 models MeHg distribution across 464,368 1-km² Chinese rice paddy grids and shows tight coupling between paddy water management, sediment Hg burden, and rice-grain MeHg. Sonke et al. 2023 synthesizes the global Hg biogeochemistry context: legacy emissions from coal combustion, artisanal gold mining, and industrial sources are the primary anthropogenic Hg loading into watersheds, with atmospheric deposition the dominant transport pathway to remote receiving systems.
For the certification-relevant takeaway: MeHg burden in any food commodity reflects upstream biogeochemistry that operates over decades-to-centuries timescales. Even if Hg emissions stopped tomorrow, the legacy Hg already in watershed sediments and oceans would continue producing MeHg for decades. Per Dietz et al. 2025 isotope-based source attribution, ocean-transported legacy Hg drives Arctic food web MeHg even where local emissions are negligible.
Biomagnification and the trophic-level rule
MeHg biomagnifies through aquatic food webs at characteristic rates that are remarkably consistent across systems. Per-trophic-level magnification factors (MeHg concentration in predator / MeHg concentration in prey) typically range 3 to 10×; over a 4-trophic-level food chain (algae → zooplankton → small fish → predatory fish), the cumulative magnification produces MeHg concentrations in apex predators 100 to 10,000× higher than the dissolved water-column MeHg. Hall et al. 2023 documents this in tidal marsh food webs across four marsh features and three site categories.
The trophic-level dependence is why fish-species selection is the dominant lever for reducing dietary MeHg exposure (see seafood and fresh-fish Levers sections). Atmospheric Hg deposition is largely unaffected by individual consumer choices; trophic-level positioning of the species consumed is the variable consumers and certifiers can shift. Li et al. 2024 (PNAS) models global fisheries to estimate catch-weighted MeHg concentrations for 1,774 marine species and demonstrates that global fishing patterns systematically expose human populations to high-MeHg apex predators because fisheries economics favor large, long-lived species.
Selenium-mercury antagonism
Selenium (Se) and mercury share a high binding affinity (Hg-Se bond formation energy approximately 70 kcal/mol, among the strongest in biochemistry). The Selenium Health Benefit Value (HBV) framework, formalized by Ralston et al. 2014, proposes that the Se:Hg molar ratio in a consumed seafood determines whether Se is bioavailable to support selenoprotein synthesis after Hg-Se binding, or whether Hg sequesters all dietary Se as inert HgSe particles. When molar Se exceeds molar Hg in the consumed matrix, net Se is bioavailable and selenoprotein-mediated antioxidant defenses (glutathione peroxidase, thioredoxin reductase, iodothyronine deiodinases) remain functional; when molar Hg exceeds molar Se, Hg-Se sequestration depletes Se from selenoprotein synthesis and the secondary cascade — oxidative stress, thyroid disruption, peroxidative tissue damage — drives the toxicological endpoint as much as direct MeHg neurotoxicity does.
Most fin-fish and shellfish have Se:Hg molar ratios above 1 (Se in excess); the notable exception is large predatory fish (swordfish, mako shark, marlin) where Hg can exceed Se. Chamorro et al. 2024 documents Se:Hg above 1 in most Atlantic bluefin tuna samples despite high absolute Hg burden, interpreted as net selenium bioavailability that may partially mitigate MeHg neurotoxicity. The mechanism is consistent with experimental data but quantitative risk modulation for certification thresholds is not yet established. The Se:Hg framework is therefore best treated as an explanatory factor for differential cohort sensitivity, not yet as a basis for relaxing MeHg ceilings on Se-rich species.
Faroe Islands and Seychelles cohort dose-response
Two long-running prospective birth cohort studies, the Faroe Islands cohort (initiated 1986, with follow-up through young adulthood) and the Seychelles Child Development Study (initiated 1989), provide the foundational dose-response data for MeHg developmental neurotoxicity that anchors most regulatory advisory derivation.
The Faroe Islands cohort, where dietary Hg exposure comes primarily from pilot whale consumption (very high MeHg, often >2 mg/kg in muscle), found consistent associations between cord-blood mercury and child neurodevelopmental endpoints at ages 7 and 14 (verbal/visuospatial/memory deficits at maternal-hair Hg around 10 µg/g, corresponding to fetal blood Hg around 40 µg/L). The Seychelles cohort, where dietary Hg exposure comes from ocean fish consumption (~12 fish meals per week, mean maternal-hair Hg around 6-7 µg/g), found no comparable adverse associations after extensive follow-up.
The interpretation framework: the two cohorts differ in exposure source (whale vs ocean fish), nutrient co-exposure profile (Faroese whale carries less of the long-chain omega-3 polyunsaturated fatty acids that may protect neurodevelopment; ocean fish carries more), and possibly selenium co-exposure (Se:Hg in pilot whale vs ocean fish). The current EFSA PTWI of 1.3 µg/kg bw/week is calibrated against the Faroe cohort dose-response; the JECFA PTWI of 1.6 µg/kg bw/week reflects a less-conservative interpretation. EPA’s IRIS RfD of 0.1 µg/kg bw/day (=0.7 µg/kg bw/week, the most conservative of the three) reflects an additional uncertainty factor applied to the Faroe data. See EFSA 2012, JECFA 2004, and EPA IRIS 2001 for the regulatory derivation details.
Polyunsaturated fatty acid (PUFA) modulation of MeHg risk
The same fish-consumption pattern that delivers MeHg also delivers long-chain omega-3 polyunsaturated fatty acids (EPA, DHA, docosapentaenoic acid). These PUFAs support fetal neurodevelopment through membrane phospholipid composition, neuronal differentiation, and anti-inflammatory eicosanoid signaling. The net risk-benefit balance for fish consumption during pregnancy depends on the MeHg/PUFA ratio of the consumed species: high in apex predators (high MeHg, modest PUFA) versus low in small oily fish (modest MeHg, high PUFA).
Vejrup et al. 2022 (Norwegian Mother, Father and Child Cohort, n=51,238 mother-child pairs) finds that prenatal MeHg exposure from fish intake associates with child emotional and behavioral problems at certain MeHg levels, but the association is attenuated when fish intake is decomposed into species categories with different PUFA content. McSorley et al. 2020 (Seychelles cohort follow-up at age 19) finds that both MeHg and long-chain PUFA associate with immune endpoints, with PUFA showing potentially protective effects that complicate any single-marker interpretation.
For certification: the MeHg ceiling on its own is not the complete picture. Standards that recommend tuna-substitution toward small oily fish (sardine, anchovy, herring, mackerel) deliver a double benefit: lower MeHg AND higher PUFA. This favors species-level guidance over uniform-MeHg-cap-applied-equally framing.
Biomarkers and exposure assessment
Three biomarkers anchor MeHg exposure assessment, each with different exposure-window sensitivity and analytical method:
- Hair mercury (total Hg by ICP-MS or CV-AAS after acid digestion). Reflects systemic MeHg exposure over the 2-3 months preceding the hair-sample collection window. Hair Hg is approximately 250× the simultaneous whole-blood Hg concentration because of preferential MeHg binding to cysteine residues in keratin. Used for cohort epidemiology (Faroe, Seychelles), occupational surveillance, and population-monitoring programs. Cegolon et al. 2022 and Oliveira et al. 2022 are recent applications.
- Whole blood mercury (total Hg by ICP-MS or CV-AFS). Reflects recent (days-to-weeks) MeHg exposure. Used clinically for acute/recent exposure assessment and in pregnancy monitoring where cord blood is the gold-standard fetal-exposure indicator.
- Urine mercury. Reflects inorganic mercury exposure primarily, not MeHg (MeHg is excreted predominantly in feces). Used for occupational dental and chlor-alkali exposure assessment, not MeHg.
Martinez-Morata et al. 2023 is the current state-of-the-science review on metal biomarkers for exposure assessment. For HMTc certification work, hair mercury is the most defensible biomarker for population-level intake validation; whole blood is appropriate for acute-exposure investigation.
Analytical methods for MeHg in food
Mercury speciation methods separate MeHg from inorganic Hg before quantification:
- Cold vapor atomic fluorescence spectrometry (CV-AFS). Total Hg quantification after acid digestion; the dominant routine method for total mercury. Used for tHg-as-proxy when MeHg/tHg ratios are well-characterized (most fin-fish at 80-95% MeHg per BfR 2024).
- Thermal decomposition amalgamation AAS (TDA-AAS, e.g., DMA-80, LECO AMA-254). Direct total Hg quantification in solid samples without prior digestion. Method of choice for rapid throughput in finfish monitoring. Carter et al. 2025 documents FDA method validation for combined TDA-AAS plus SALLE extraction for both MeHg and total Hg in finfish.
- Gas chromatography ICP-MS (GC-ICP-MS) and liquid chromatography ICP-MS (LC-ICP-MS). Direct MeHg quantification after derivatization or extraction. The reference methods for MeHg speciation in regulatory and certification contexts.
- Isotope-dilution MS. Highest-accuracy MeHg quantification for reference-material certification and trace-level work.
For HMTc certification: tHg by TDA-AAS is acceptable for routine lot-level screening on finfish; speciated MeHg by GC-ICP-MS or LC-ICP-MS is required for any threshold work that explicitly distinguishes MeHg from total Hg or that applies tighter standards to lower-trophic species than to apex predators.
Rice as a secondary MeHg exposure pathway
Rice is the second-most-important dietary MeHg source after fish, particularly in Asian populations with low fish consumption but high paddy-grown rice consumption. Paddy rice grown in contaminated soils (artisanal-gold-mining-impacted watersheds, chlor-alkali-contaminated regions, peatland-overlying paddies with high sulfate-reducing bacterial activity) can carry MeHg in the 5-50 µg/kg range, with extreme cases exceeding 100 µg/kg.
Brombach et al. 2016 reports that MeHg in commercial European rice varies more than one order of magnitude across products, with country of origin (rice from regions with documented sediment Hg burden carrying more MeHg) as the primary explanatory variable. Cui et al. 2022 models MeHg in Chinese paddy systems at 1-km² resolution. Rothenberg et al. 2021 documents a cohort in rural China where rice-derived maternal MeHg exposure associates with child neurodevelopmental endpoints — the first cohort study to demonstrate the rice-MeHg pathway as a meaningful contributor to developmental risk independent of the fish pathway.
For certification and advisory: populations with high rice intake (especially from at-risk regions) and low fish intake may still have meaningful MeHg exposure that fish-consumption advisories do not address. The wiki’s rice-related ingredient pages (rice, rice-cereal, rice-flour) should record the MeHg pathway alongside the better-known iAs pathway.
Open questions
Several MeHg-toxicology and -exposure questions remain active research areas where the wiki does not yet take a synthesis position:
- Cardiovascular MeHg effects. Some cohort studies report MeHg-cardiovascular associations; others do not. Whether MeHg contributes meaningfully to cardiovascular risk in moderate-intake populations remains contested.
- Thyroid cancer and MeHg. Webster et al. 2024 meta-analysis examines this; the evidence base is small but suggestive.
- Climate-change projection robustness outside China. Wu et al. 2025 documents +60% MeHg projection by 2031-2060 for Chinese freshwater fish. Whether this generalizes to non-Chinese watersheds depends on parameter transferability that has not been independently validated.
- Selenium-MeHg quantitative risk modulation. The Ralston Se HBV framework is mechanistically supported but not yet quantitatively integrated into regulatory thresholds. Whether HMTc certification standards should differentiate by Se:Hg ratio is an open question.
- Microbiome-mediated MeHg modulation. Coe et al. 2023 documents gnotobiotic-mouse evidence that gut microbiota influence MeHg demethylation; human translation is incomplete.
- PUFA-MeHg risk-benefit quantification. Net risk-benefit modeling is methodologically complex and current frameworks (FDA-EPA Best/Good/Avoid tiers, EFSA recommendations) treat species-level guidance as the operational summary.
Sources
Auto-generated from source-page frontmatter. The “Used on this page for” column is populated by the orchestrator’s POPULATE-SOURCE-LEGEND action; pending entries appear as *[awaiting synthesis]*.
| # | Citation | Year | Type | Used on this page for |
|---|---|---|---|---|
| 1 | ANSES 2026. Opinion of the French Agency for Food, Environmental and Occupational Health & Safety on the results of the Third French Total Diet Study (TDS3) - Acrylamide, aluminium, silver, cadmium, mercury and lead, ANSES Opinion, Request No 2019-SA-0010 | 2026 | Government report | FR Al, Ag, Cd, Pb, tHg, iHg, MeHg occurrence in French TDS3 foods selected from 276 foods across 44 groups, with 718 samples collected in Loiret, Puy-de-Dome, and… (n=718) |
| 2 | Hernández-Montoya et al. 2026. Heavy Metal Contamination in Foods: Advances in Detection Technologies, Regulatory Challenges, Health Risks, and Implications for Sustainable Food Safety, Sustainability | 2026 | Peer-reviewed | codex/EU/US Pb, Cd, tAs, tHg, MeHg, Ni occurrence in Scoping review of 121 peer-reviewed studies (Scopus, Web of Science, ScienceDirect, SpringerLink, Wiley Online Library, Google Scholar; published… |
| 3 | Jaiswal et al. 2026. A review of metal(loid) contamination in breast milk: from environmental exposure to infants’ perils, Environmental Monitoring and Contaminants Research | 2026 | Review | Global tAs, Cd, Cr, Pb, tHg, MeHg occurrence in Narrative review of published studies reporting quantitative As, Cd, Cr, Pb, and Hg concentrations in human breast milk… |
| 4 | Kim et al. 2026. Combined exposure to lead, methylmercury, and cadmium impairs spatial memory and dopaminergic signaling in mouse hippocampus, Frontiers in Public Health | 2026 | Peer-reviewed | MeHg data: Fifty male ICR mice were divided into five groups and exposed for 28 days via drinking water to lead (25 mg/L as lead acetate), methylmercury (10 mg/L as methylmercury chloride)… |
| 5 | Largueza et al. 2026. Essential and Potentially Toxic Elements in Commercial Milk Formulas: Health Risk Assessment Through a Systematic Review and Meta-analysis, Biological Trace Element Research | 2026 | Peer-reviewed | BR/EU/US Al, iAs, tAs, Cd, Co, Cr, Cu, Fe, MeHg, Mn, Ni, Pb, U, Zn occurrence in Systematic review with meta-analysis of 30 observational studies (PRISMA, OSF.IO/2YNKB registered), 18 with pooled meta-analysis data, covering three… (n=30) |
| 6 | Lepak et al. 2026. Quantifying Depuration of Methylmercury from Fish Consumption by Travelers, Environmental Health | 2026 | Peer-reviewed | MeHg depuration rates after fish consumption: half-life data and implication for exposure modelling |
| 7 | Rusko et al. 2026. Risk-Benefit Assessment of Mercury, Lead, Cadmium, and Arsenic in Inland Fish from Latvian Lakes, Foods | 2026 | Peer-reviewed | MeHg concentrations in freshwater fish (n=460) |
| 8 | WHO 2026. GEMS/Food Contaminants database heavy-metal exports, GEMS/Food Contamination Monitoring and Assessment Programme | 2026 | Government dataset | WHO GEMS/Food contaminants database: global MeHg occurrence monitoring data across food commodities |
| 9 | Wu et al. 2026. Whole-Cell Biosensor for Sensitive Detection of Methylmercury in Environmental Water, Biosensors and Bioelectronics | 2026 | Peer-reviewed | Analytical sensor for MeHg detection in aqueous/environmental matrices, cited for analytical-methods context |
| 10 | Auzier et al. 2025. Systematic review and spatiotemporal assessment of mercury concentration in fish from the Tapajós River Basin: implications for environmental and human health, ACS Environmental Au | 2025 | Peer-reviewed | Systematic review of MeHg in fish muscle: synthesised occurrence, health effects, and exposure data |
| 11 | Barber et al. 2025. Toxic elements in baby and young children’s foods in the US and correlation to ingredients, Food Additives & Contaminants: Part B | 2025 | Peer-reviewed | US tAs, iAs, Cd, tHg, MeHg, Pb, Tl occurrence in Non-targeted 2023 FDA convenience survey of 566 foods intended for babies, young children, pregnant women, and nursing mothers:… (n=566) |
| 12 | Carter et al. 2025. Thermal Decomposition Amalgamation AAS and SALLE for Methylmercury and Total Mercury in Finfish: FDA Method Validation | 2025 | Peer-reviewed | MeHg concentrations in fish muscle by AAS |
| 13 | Chen et al. 2025. Probabilistic assessment of the cumulative risk from dietary heavy metal exposure in Chongqing, China using a hazard-driven approach, Scientific Reports 15:2229 | 2025 | Peer-reviewed | CN/EU Pb, Cd, iAs, MeHg occurrence in 969 participants from China Health and Nutrition Survey 2018, Chongqing Municipality: 31 preschoolers (3-6 yr), 113 adolescents (7-17… (n=969) |
| 14 | Silva et al. 2025. Neurodevelopmental Outcomes Associated with Early-Life Exposure to Heavy Metals: A Systematic Review, International Journal of Environmental Research and Public Health 22(8):1308 | 2025 | Peer-reviewed | international Pb, tHg, MeHg, Cd, tAs, Mn occurrence in Pooled across 68 included primary studies (48 longitudinal + 20 cross-sectional), comprising 215,195 individuals from 23 countries. Japan… (n=215195) |
| 15 | Dietz et al. 2025. Stable isotopes unveil ocean transport of legacy mercury into Arctic food webs, Nature Communications | 2025 | Peer-reviewed | GL tHg, MeHg occurrence in Arctic char, shorthorn sculpin, ringed seal, glaucous gull, polar bear, and peat samples across Greenland (Central West, Northwest,… |
| 16 | Groleau et al. 2025. Improving nutritional intakes and reducing metal(loid) exposures from wild fish broth among Inuit pregnant women, Science of the Total Environment | 2025 | Peer-reviewed | CA tHg, MeHg, tAs, iAs, Cd, Pb, Se, Fe, K occurrence in Nunavik (northern Quebec), Canada; Inuit country food samples including lake trout (n=43 large >0.5 kg, additional smaller specimens),… (n=140) |
| 17 | Jermilova et al. 2025. Assessing mercury exposure to water and fish of the Mackenzie watershed using a Bayesian network analysis, Integrated Environmental Assessment and Management | 2025 | Peer-reviewed | MeHg concentrations in fish and seafood (n=1044) |
| 18 | Lepak et al. 2025. Correction: Mercury Concentrations in Sport Fish from Colorado Reservoirs, PLOS ONE | 2025 | Peer-reviewed | MeHg concentrations in freshwater fish |
| 19 | Lucchini et al. 2025. Mercury contamination in the Amazon Basin: fish consumption, co-exposures, and health implications for indigenous and riverside communities, Annals of Global Health | 2025 | Peer-reviewed | BR Hg, MeHg, tHg occurrence in Review of studies covering Amazonian fish species and indigenous/riverside human populations; fish Hg concentrations 0.10–4.73 µg/g; hair mercury… |
| 20 | MacDonald et al. 2025. Occurrence of chemical contaminants in wild-caught fishery products of relevance to Scottish and wider UK Fishing Waters: A Review, Fera Science Ltd report to Food Standards Scotland (Report FR/002826) | 2025 | Agency report | GB/EU tHg, MeHg, Cd, Pb, tAs, iAs, Ni, Cr occurrence in Narrative + tabular review of chemical contaminants in wild-caught and smoked fish, shellfish, crustaceans, and cephalopods from Scottish… (n=192) |
| 21 | Masri et al. 2025. Assessing Dietary Consumption of Toxicant-Laden Foods and Beverages by Age and Ethnicity in California: Implications for Proposition 65, Nutrients | 2025 | Peer-reviewed | US Pb, Cd, tAs, MeHg occurrence in Cross-sectional online dietary survey (Qualtrics) administered between 1 March and 15 June 2023 to Southern California residents (adults… (n=186) |
| 22 | Mititelu et al. 2025. Assessing Heavy Metal Contamination in Food: Implications for Human Health and Environmental Safety, Toxics | 2025 | Review | EU/US/RO Pb, Cd, tAs, iAs, tHg, MeHg, Ni, Cr, Sn occurrence in Narrative review; no primary sample collection. Synthesizes published literature and regulatory data across multiple countries. |
| 23 | Seyfferth et al. 2025. Concentrations and Health Implications of As, Hg, and Cd and Micronutrients in Rice and Emissions of CH4 From Variably Flooded Paddies, GeoHealth | 2025 | Peer-reviewed | MeHg concentrations in rice bran (n=6) |
| 24 | Taylor et al. 2025. Seafood Benefits and Contaminants: A Comprehensive Review of Health Impacts, Safety Concerns, and Risk Mitigation Strategies, Foods | 2025 | Peer-reviewed | MeHg concentrations in fish and seafood |
| 25 | Thoerig et al. 2025. Assessment of arsenic, cadmium, lead, mercury, and per- and polyfluoroalkyl substances concentrations in human milk and infant formula in the United States: a systematic review, American Journal of Clinical Nutrition, Vol. 122, pp. 1006-1026 | 2025 | Peer-reviewed | Systematic review of MeHg in infant formula: synthesised occurrence, health effects, and exposure data |
| 26 | Wu et al. 2025. Climate change amplifies neurotoxic methylmercury threat to Asian fish consumers, Proceedings of the National Academy of Sciences | 2025 | Peer-reviewed | CN MeHg, tHg occurrence in Freshwater wild and farmed fish, marine wild fish sampled across China (22.5–49.4° N, 85.2–134.6° E, 2005–2020, 164 sampling… (n=13000) |
| 27 | Zhou et al. 2025. Microbial potential to mitigate neurotoxic methylmercury accumulation in farmlands and rice, Nature Communications | 2025 | Peer-reviewed | CN MeHg, tHg occurrence in Paddy soils and upland soils with high or low background Hg contamination, China; rice grain MeHg projections across… |
| 28 | ATSDR 2024. Toxicological Profile for Mercury, U.S. Department of Health and Human Services, Public Health Service, Agency for Toxic Substances and Disease Registry | 2024 | Government report | ATSDR toxicological profile for mercury2024 cited for comparative context on the methylmercury page |
| 29 | Barquero et al. 2024. A preliminary assessment of mercury, methylmercury and other potentially toxic elements in largemouth bass (Micropterus salmoides) from the Almadén mining district, Environmental Geochemistry and Health | 2024 | Peer-reviewed | ES/EU tHg, MeHg, tAs, Pb, Sb occurrence in Largemouth bass (Micropterus salmoides) from a 34 km transect of the Valdeazogues River, Almadén mercury mining district, Ciudad… |
| 30 | BfR 2024. Methylmercury in fish and seafood – health risk assessment of new data from the BfR MEAL study, BfR Opinion 023/2024 | 2024 | Government report | DE/EU MeHg, tHg occurrence in German population across age groups (infants 0.5–<1 yr through elderly 65–<80 yr); consumption data from KiESEL (n=1,008 children… |
| 31 | Chamorro et al. 2024. Atlantic bluefin tuna (Thunnus thynnus): health benefits, contaminants and risk-benefit analysis for human consumption, Food Reviews International | 2024 | Peer-reviewed | EU tHg, MeHg, Cd, Pb, As occurrence in Review of Atlantic bluefin tuna (Thunnus thynnus) literature on contaminants and nutritional composition |
| 32 | Codex 2024. Report of the 17th Session of the Codex Committee on Contaminants in Foods (REP24/CF17), Joint FAO/WHO Food Standards Programme, Codex Alimentarius Commission | 2024 | Government report | Codex CCCF 2024 deliberations: MeHg maximum level amendments and new commodity inclusions |
| 33 | Eccles et al. 2024. Non-invasive biomonitoring of polar bear feces can be used to estimate concentrations of metals of concern in traditional food, PLOS ONE | 2024 | Peer-reviewed | CA tAs, Cd, Pb, tHg, MeHg, Ni occurrence in Polar bears (Ursus maritimus) harvested through community-based legal hunts in six subpopulations across the Canadian Arctic (2016–2019): Northern… (n=49) |
| 34 | Escobar-Camacho et al. 2024. Mercury in aquatic ecosystems of two indigenous communities in the Piedmont Ecuadorian Amazon: evidence from fish, water, and sediments, Environmental Science and Pollution Research | 2024 | Peer-reviewed | EC tHg, MeHg occurrence in Freshwater fish from Cofán-Bermejo and Dureno indigenous territory rivers, Sucumbíos Province, Ecuador; also water and sediment samples from… (n=120) |
| 35 | Ewubare et al. 2024. An Academic Review on Heavy Metals in the Environment: Effects on Soil, Plants Human Health, and Possible Solutions, American Journal of Environmental Economics 3(1) 70-81 | 2024 | Review | NG Pb, Cd, tHg, MeHg, Cr, Cr-VI, tAs, Ni, Cu, Zn, Mn, Co, Sb, Tl, Mo occurrence in Narrative review article; no primary samples. Synthesizes literature retrieved from Google Scholar, Frontier in Microbiology, AJOL, Scopus, Web… |
| 36 | Kanazawa 2024. Mercury speciation in artisanal small-scale gold mining (ASGM) environments in Kenya, unknown | 2024 | Peer-reviewed | MeHg data: Mercury speciation including total Hg and methylmercury (MeHg) was measured in environmental matrices (soil, water, sediment) from artisanal small-scale gold mining (ASGM) areas… |
| 37 | Li et al. 2024. Global fishing patterns amplify human exposures to methylmercury, Proceedings of the National Academy of Sciences | 2024 | Peer-reviewed | global MeHg occurrence in Global fisheries modeling dataset: catch-weighted MeHg concentrations estimated for 1,774 marine species across global exclusive economic zones using… (n=1482) |
| 38 | Rohonczy et al. 2024. Cadmium and mercury trophic transfer in the Arctic marine food web of Hudson Bay, Environmental Science and Pollution Research | 2024 | Peer-reviewed | CA Cd, tHg, MeHg occurrence in Multiple Arctic marine species from Hudson Bay, Canada: blue mussel, common eider, sculpin, Arctic cod, ringed seal (n=781) |
| 39 | Serreau et al. 2024. Pollutants in Breast Milk: A Scoping Review of the Most Recent Data in 2024, Healthcare | 2024 | Review | Pb, Cd, tAs, MeHg, tHg occurrence in Scoping review of 54 articles (1995–2023) on persistent organic pollutants and heavy metals in breast milk; globally distributed… |
| 40 | Tatsuta et al. 2024. Dietary intake of methylmercury by 0–5 years children using the duplicate diet method in Japan, Environmental Health and Preventive Medicine | 2024 | Peer-reviewed | JP tHg, MeHg occurrence in 260 children aged 0–5 years from the Pacific side of Tohoku, Japan, providing 276 24-hour dietary duplicate samples… (n=276) |
| 41 | Tatsuta et al. 2024. Dietary intake of methylmercury by 0-5 years children using the duplicate diet method in Japan, Environmental Health and Preventive Medicine | 2024 | Peer-reviewed | JP MeHg, tHg occurrence in Japanese children aged 0-5 years residing in the Tohoku region (n=260) |
| 42 | Tatsuta et al. 2024. Dietary intake of methylmercury by 0-5 years children using the duplicate diet method in Japan, Environmental Health and Preventive Medicine | 2024 | Peer-reviewed | MeHg data: This duplicate-diet study measured total mercury and methylmercury in diets consumed by Japanese children aged 0-5 years. |
| 43 | Webster et al. 2024. Mercury exposure and thyroid cancer: a systematic review and meta-analysis, Environmental Science and Pollution Research | 2024 | Peer-reviewed | tHg, MeHg occurrence in Meta-analysis of studies examining mercury exposure and thyroid cancer risk |
| 44 | Al-Sulaiti et al. 2023. Health risk assessment of methyl mercury from fish consumption in a sample of adult Qatari residents, Environmental Science and Pollution Research | 2023 | Peer-reviewed | QA tHg, MeHg occurrence in Adult Qatari residents aged 18+ (n=600 dietary survey respondents; 65 composite fish samples across 7 species) (n=65) |
| 45 | Peinador 2023. Study of Heavy Metals and Methyl-Mercury in Fungi in Markets of Madrid, Spectroscopy | 2023 | Peer-reviewed | ES/EU Cd, Pb, tHg, MeHg occurrence in 48 cultivated and wild edible mushroom samples purchased in local markets in Madrid, Spain, with wild samples supplied… (n=48) |
| 46 | ATSDR 2023. Exposure Dose Guidance for Soil/Sediment Dermal Absorption (Version 3), ATSDR / U.S. Department of Health and Human Services - Public Health Service | 2023 | Government report | US As, Cd, Pb, Hg, MeHg, Ni, Cr, Cr-VI, Sb, Ba, Cu, Mn, Se, Ag, Tl, V, Zn, Be occurrence in Regulatory exposure-assessment guidance; no original sampling. Default ABSd and adherence-factor values from EPA RAGS Part E (2004); skin-surface… |
| 47 | Bae et al. 2023. Heavy metal concentrations in commercial tuna products in Korea and assessment of health risks, unknown | 2023 | Peer-reviewed | KR MeHg, tHg, Pb, Cd, tAs occurrence in Commercial tuna products purchased in Korea (n=31) |
| 48 | BfR 2023. What’s in your food — BfR MEAL Study Final Report (Germany’s first Total Diet Study), BfR Science Report | 2023 | Government report | DE/EU Pb, Cd, tAs, iAs, tHg, MeHg, Ni, Al, Sn, Sb occurrence in Germany’s first Total Diet Study. Core element module: 869 pooled samples (868 for nitrate) comprised of 13,552 subsamples… (n=869) |
| 49 | Blanco et al. 2023. Mercury levels in fish in the Valencian Community: temporal evolution (2011-2017) and associated factors, Revista Española de Salud Pública | 2023 | Peer-reviewed | ES/EU tHg, MeHg occurrence in Fish samples collected under the Valencian Community food health surveillance programme (Generalitat Valenciana); 560 THg measurements, 206 MeHg… (n=635) |
| 50 | Coe et al. 2023. Assessing the Role of the Gut Microbiome in Methylmercury Demethylation and Elimination in Humans and Gnotobiotic Mice, Archives of Toxicology, Vol. 97, pp. 2399-2418 | 2023 | Peer-reviewed | MeHg microbial methylation/demethylation: gut microbiota roles in speciation and bioaccessibility |
| 51 | source) 2023. Concentration of Essential, Toxic, and Rare Earth Elements in Ready-to-Eat Baby Purees from the Spanish Market, Nutrients | 2023 | Journal article | Cited reference from Nutrients |
| 52 | Diogène et al. 2023. Risk Assessment Strategies for Contaminants in Seafood (RASCS), EFSA Supporting Publications 2023:EN-8419 | 2023 | Government report | EU tAs, iAs, Pb, Cd, tHg, MeHg, Ni, Cr, Al occurrence in Strategy/programmatic report from a seven-institution EU consortium (IRTA Spain coordinator, CREDA Spain, IPMA Portugal, ISS Italy, Ghent University… |
| 53 | Hall et al. 2023. Linking Mesoscale Spatial Variation in Methylmercury Production to Bioaccumulation in Tidal Marsh Food Webs, Environmental Science & Technology | 2023 | Peer-reviewed | US MeHg, tHg occurrence in Primary and secondary consumers (gastropods, bivalves, amphipods, beetles, spiders, shrimp, crabs, fish) from four marsh features at three… (n=116) |
| 54 | Kim et al. 2023. Risk Assessment and Determination of Arsenic and Heavy Metals in Fishery Products in Korea, Foods | 2023 | Peer-reviewed | KR Pb, Cd, tAs, tHg, MeHg occurrence in Fishery products purchased from grocery stores and markets in Seoul, Incheon, Daejeon, Gangneung, Busan, and Gwangju from January… (n=1186) |
| 55 | Leclerc et al. 2023. Enhanced Bioaccumulation and Transfer of Monomethylmercury through Periphytic Biofilms in Benthic Food Webs of a River Affected by Run-of-River Dams, Environmental Science & Technology | 2023 | Peer-reviewed | CA MeHg, tHg occurrence in Periphyton, benthic macroinvertebrates, and juvenile fish from St. Maurice River (Québec, Canada) affected by two run-of-river hydroelectric power… |
| 56 | Y-C et al. 2023. Health Risk of Infants Exposed to Lead and Mercury Through Breastfeeding, Exposure and Health | 2023 | Peer-reviewed | TW Pb, tHg, MeHg occurrence in 228 breast milk samples longitudinally donated by 39 lactating women (mean age 33.1 years, all non-smokers and non-drinkers)… (n=228) |
| 57 | Martín-Carrasco et al. 2023. Comparison between pollutants found in breast milk and infant formula in the last decade: A review, Science of the Total Environment | 2023 | Peer reviewed review | EU/MA/NG Pb, Cd, tHg, MeHg, tAs, Al, Cr, Cu, Ni, Zn, Fe, Mn, Co, Sn, Se, Sb occurrence in Narrative review of 65 breast-milk studies and 73 infant-formula studies published 2012–2022, covering metals, heat-treatment products, pharmaceuticals, mycotoxins,… |
| 58 | Martinez-Morata et al. 2023. A State-of-the-Science Review on Metal Biomarkers, Current Environmental Health Reports, Vol. 10, No. 3, pp. 215-249 | 2023 | Peer-reviewed | State-of-the-science review on metal biomarkers: blood, urine, and tissue matrices for MeHg exposure assessment |
| 59 | Nazari et al. 2023. Impacts of Heavy Metals in Seed Crops and Oil Seed on Human Health: A Threat to Food Safety — Review, Carpathian Journal of Food Science and Technology, 15(2), 106-124 | 2023 | Review | global/EU/IR Pb, Cd, iAs, tAs, tHg, MeHg, Ni, Cr, Cr-VI occurrence in Narrative literature review of published studies on heavy metal occurrence in oilseeds (sunflower, pumpkin, sesame, rape, mustard, linseed,… |
| 60 | New York State Department 2023. Toxic Chemicals in Children’s Products Program: Chemicals and Practical Quantitation Limits Under Consideration (Draft Update, Feb. 2023), NY DEC Toxic Chemicals in Children’s Products Program — stakeholder draft for public comment | 2023 | Regulation | US-NY Sb, tAs, Cd, Cr, Cr-VI, Pb, tHg, MeHg, Ni occurrence in Draft regulatory chemical list — proposes Chemicals of Concern (COCs) and High Priority Chemicals (HPCs) plus practical quantitation… |
| 61 | Sadhya et al. 2023. Regulation in India of Heavy Metals in Food Items: A Critical Analysis, Environmental Analysis & Ecology Studies | 2023 | Review | IN Pb, Cu, tAs, Sn, Cd, tHg, MeHg, Cr, Ni, Se, Sb, Ba, Co, Fe, Li, Mn, Zn occurrence in Legal review of the Indian regulatory framework governing heavy metals in food and food packaging. No primary measurements… |
| 62 | Seelen et al. 2023. Dissolved organic matter thiol concentrations determine methylmercury bioavailability across the terrestrial-marine aquatic continuum, Nature Communications | 2023 | Peer-reviewed | US MeHg, tHg occurrence in Aquatic sites across terrestrial-marine continuum (rivers, estuaries, coastal waters), northeastern USA (n=20) |
| 63 | Sonke et al. 2023. Global change effects on biogeochemical mercury cycling, Ambio | 2023 | Peer-reviewed | tHg, MeHg occurrence in Global synthesis — multiple study populations and monitoring networks |
| 64 | Suomi et al. 2023. Cumulative risk assessment of the dietary heavy metal and aluminum exposure of Finnish adults, Environmental Science and Pollution Research | 2023 | Peer-reviewed | FI/EU Cd, Pb, iAs, MeHg, Ni, Al occurrence in Finnish adults aged 25–74 years from FinDiet 2012 national dietary survey (48-h recall; 5 geographic areas) (n=1295) |
| 65 | USDA 2023. China Releases the Standard for Maximum Levels of Contaminants in Foods (USDA FAS GAIN Report CH2023-0040, unofficial translation of GB 2762-2022), USDA Foreign Agricultural Service, Global Agricultural Information Network (GAIN), Report Number CH2023-0040 | 2023 | Regulation | CN Pb, Cd, tHg, MeHg, tAs, iAs, Sn, Ni, Cr occurrence in null |
| 66 | Vasilachi et al. 2023. Analysis of Heavy Metal Impacts on Cereal Crop Growth and Development in Contaminated Soils, Agriculture | 2023 | Review | Pb, Cd, tAs, Cr, Cr-VI, Ni, Al, tHg, MeHg occurrence in Narrative literature review synthesising prior studies on cereal crops (wheat, rice, maize, barley, rye, oats, millet) grown in… |
| 67 | Wang et al. 2023. Climate-driven changes of global marine mercury cycles in 2100, Proceedings of the National Academy of Sciences | 2023 | Peer-reviewed | tHg, MeHg occurrence in Global coupled climate-biogeochemistry model projections under RCP4.5 and RCP8.5 scenarios to 2100; no new observational data generated |
| 68 | Willacker et al. 2023. Reservoir Stratification Modulates the Influence of Impoundments on Fish Mercury Concentrations along an Arid Land River System, Environmental Science & Technology | 2023 | Peer-reviewed | US tHg, MeHg occurrence in Smallmouth Bass (Micropterus dolomieu) collected from reservoir, tailrace, and free-flowing reaches along 853 km of the Snake River… |
| 69 | Cegolon et al. 2022. Concentration of mercury in human hair and associated factors in residents of the Gulf of Trieste (North-Eastern Italy), Environmental Science and Pollution Research | 2022 | Peer-reviewed | IT/EU tHg, MeHg occurrence in General population residents of Friuli Venezia Giulia (FVG) coastal region, Gulf of Trieste, Italy; convenience sample recruited at… (n=301) |
| 70 | Cui et al. 2022. Source apportionment of speciated mercury in Chinese rice grain using a high-resolution model, ACS Environmental Au | 2022 | Peer-reviewed | CN tHg, MeHg occurrence in Model-simulated distribution across 464,368 Chinese rice paddy grids (1 km × 1 km), validated against field measurements |
| 71 | EC 2022. Commission Regulation (EU) 2022/617 of 12 April 2022 amending Regulation (EC) No 1881/2006 as regards maximum levels of mercury in fish and salt, Official Journal of the European Union, OJ L 115, 13.4.2022, pp. 60–63 | 2022 | Regulation | EU tHg, MeHg occurrence in Regulatory instrument — establishes binding maximum levels (MLs) for total mercury in fishery products on the EU market |
| 72 | Falandysz et al. 2022. Total mercury and methylmercury (MeHg) in braised and crude Boletus edulis carpophores during various developmental stages, Environmental Science and Pollution Research | 2022 | Peer-reviewed | PL tHg, MeHg occurrence in Boletus edulis carpophores grouped by developmental stage (button, young-white, large-white, large-yellow), analyzed as crude mushrooms and after braising. (n=4) |
| 73 | Li et al. 2022. Internal Dynamics and Metabolism of Mercury in Biota: A Review of Insights from Mercury Stable Isotopes, Environmental Science & Technology | 2022 | Peer-reviewed | tHg, MeHg occurrence in Synthesis of mercury isotope fractionation data across multiple biota studies (review) |
| 74 | Motta et al. 2022. Mercury isotopic evidence for the importance of particles as a source of mercury to marine organisms, Proceedings of the National Academy of Sciences | 2022 | Peer-reviewed | tHg, MeHg occurrence in Marine organisms (mesopelagic and bathypelagic fish and zooplankton) and water/particle samples from the North Pacific Ocean |
| 75 | Oliveira et al. 2022. Fish consumption habits of pregnant women in Itaituba, Tapajós River basin, Brazil: risks of mercury contamination as assessed by measuring total mercury in highly consumed piscivore fish species and in hair of pregnant women, Archives of Industrial Hygiene and Toxicology | 2022 | Peer-reviewed | BR tHg, MeHg occurrence in 110 pregnant women in Itaituba, Brazil; 120 fish samples (30 Cichla spp. and 30 Plagioscion squamosissimus per season) (n=170) |
| 76 | Rundio et al. 2022. High mercury concentrations in steelhead/rainbow trout, sculpin, and terrestrial invertebrates in a stream-riparian food web in coastal California, Ecotoxicology | 2022 | Peer-reviewed | US tHg, MeHg occurrence in Steelhead/rainbow trout (n=20), coastrange sculpin (n=10), and terrestrial and aquatic invertebrates (n=31 pooled samples) from Big Creek watershed,… (n=61) |
| 77 | Suzuki et al. 2022. Presence of nano-sized mercury-containing particles in seafoods, and an estimate of dietary exposure, Environmental Pollution | 2022 | Peer-reviewed | JP tHg, MeHg occurrence in Ninety raw fish and shellfish samples purchased in Japan in 2019-2020 across eight groups: tuna and swordfish, salmon… (n=90) |
| 78 | Vejrup et al. 2022. Prenatal methylmercury exposure from fish intake and child emotional and behavioural problems: results from the Norwegian Mother, Father and Child Cohort Study, BMJ Nutrition, Prevention and Health | 2022 | Peer-reviewed | NO MeHg, tHg occurrence in 51,238 mother-child pairs from the Norwegian Mother, Father and Child Cohort Study (MoBa) (n=51238) |
| 79 | Balali-Mood et al. 2021. Toxic Mechanisms of Five Heavy Metals: Mercury, Lead, Chromium, Cadmium, and Arsenic, Frontiers in Pharmacology 12:643972 | 2021 | Peer-reviewed | Multi-metal toxicology review covering MeHg: oxidative stress, DNA damage, enzyme inhibition, and carcinogenic mechanisms |
| 80 | Cleary et al. 2021. Comparison of Recreational Fish Consumption Advisories Across the USA, Current Environmental Health Reports | 2021 | Peer-reviewed | US MeHg occurrence in Technical guidance documents from 46 US states; fish consumption advisory data collected 2019 (n=46) |
| 81 | Falandysz et al. 2021. Total mercury and methylmercury (MeHg) in braised and crude Boletus edulis carpophores during various developmental stages, Environmental Science and Pollution Research | 2021 | Peer-reviewed | PL tHg, MeHg occurrence in Boletus edulis fruiting bodies grouped by developmental stage: button n=19, young white n=8, large white n=3, and large… (n=34) |
| 82 | Gfeller et al. 2021. Mercury mobility, colloid formation and methylation in a polluted Fluvisol as affected by manure application and flooding-draining cycle, Biogeosciences | 2021 | Peer-reviewed | CH tHg, MeHg, Mn, Fe, Cu, tAs, Cr, Co, Ni, Zn, Cd, Pb, V, U, Ba occurrence in Triplicate microcosms using two Hg-polluted agricultural Fluvisol soils from the Rhone Valley, Switzerland: cornfield high-Hg low-carbon soil and… (n=12) |
| 83 | Mehouel et al. 2021. Review of the toxic trace elements arsenic, cadmium, lead and mercury in seafood species from Algeria and contiguous waters in the Southwestern Mediterranean Sea, Environmental Science and Pollution Research | 2021 | Peer reviewed review | DZ/TN/MA tAs, Cd, Pb, tHg, MeHg occurrence in Narrative review of published As, Cd, Pb, Hg, and MeHg occurrence studies in fish, mollusks, and crustaceans from… |
| 84 | Rothenberg et al. 2021. Maternal methylmercury exposure through rice ingestion and child neurodevelopment in the first three years: a prospective cohort study in rural China, Environmental Health, Vol. 20, Article 50 | 2021 | Peer-reviewed | MeHg concentrations in rice and rice products |
| 85 | Stanton et al. 2021. The Metallome as a Link Between the Omes in Autism Spectrum Disorders, Frontiers in Molecular Neuroscience 14:695873 | 2021 | Peer-reviewed | MeHg dyshomeostasis in neurodevelopmental conditions: metallome dysregulation context |
| 86 | Wang et al. 2021. Mercury accumulation in vegetable Houttuynia cordata Thunb. from two different geological areas in southwest China and implications for human consumption, Scientific Reports 11:1470 | 2021 | Peer-reviewed | CN tHg, MeHg occurrence in Edible Houttuynia cordata tissues collected from a mercury mining area and a non-mining comparison area in southwest China. (n=Houttuynia cordata plants and rhizosphere soils from Danzhai mercury-mining and Zhijin non-mining areas in Guizhou, China; tissue-level n varies by site/tissue table.) |
| 87 | Wickliffe et al. 2021. Exposure to total and methylmercury among pregnant women in Suriname: sources and public health implications, Journal of Exposure Science and Environmental Epidemiology | 2021 | Peer-reviewed | SR tHg, MeHg occurrence in Pregnant women in Suriname; three geographic cohorts: interior communities, Paramaribo (capital), and Nickerie (rice-growing region) (n=807) |
| 88 | McSorley et al. 2020. Methylmercury and long chain polyunsaturated fatty acids are associated with immune dysregulation in young adults from the Seychelles child development study, Environmental Research | 2020 | Peer-reviewed | SC MeHg, tHg occurrence in Young adults (approximately age 19) from the Seychelles Child Development Study cohort; high fish-consuming island population (~7 fish… (n=497) |
| 89 | Pawlaczyk et al. 2020. Risk of Mercury Ingestion from Canned Fish in Poland, Molecules | 2020 | Peer-reviewed | PL tHg, MeHg occurrence in Eighty-four canned fish products covering 25 brands from over 14 producers (19 brands of canned fish plus six… (n=84) |
| 90 | Centre for Food Safety 2019. Guidelines on the Food Adulteration (Metallic Contamination) (Amendment) Regulation 2018, USDA Foreign Agricultural Service GAIN Report HK1922, relaying the Hong Kong Centre for Food Safety Guidelines for the Food Adulteration (Metallic Contamination) (Amendment) Regulation 2018 (Cap. 132V sub. leg.) | 2019 | Government report | HK Sb, tAs, iAs, Ba, B, Cd, Cr, Cu, Pb, Mn, MeHg, tHg, Ni, Se, Sn, U occurrence in Not a sampling study. Regulatory document setting maximum levels (MLs) for 14 metallic contaminants across food and food… |
| 91 | Zealand 2019. 25th Australian Total Diet Study, Food Standards Australia New Zealand | 2019 | Government report | Food Standards Australia New Zealand: MeHg occurrence and dietary exposure from the 25th Total Diet Study |
| 92 | Fu et al. 2019. The Effects of Heavy Metals on Human Metabolism, Toxicology Mechanisms and Methods | 2019 | Review | Pb, Cd, tAs, iAs, tHg, MeHg, Ni occurrence in Narrative review of mechanism literature for five heavy metals; cites human occupational and drinking-water exposure studies plus animal… |
| 93 | Mehouel et al. 2019. Risk assessment of mercury and methyl mercury intake via sardine and swordfish consumption in Algeria, Journal of the Hellenic Veterinary Medical Society | 2019 | Peer-reviewed | DZ tHg, MeHg occurrence in Sardine and swordfish collected from Bejaia, Algiers, and Oran coasts in Algeria, April-September 2017 |
| 94 | Harding et al. 2018. Bioaccumulation of methylmercury within the marine food web of the outer Bay of Fundy, Gulf of Maine, PLoS ONE | 2018 | Peer-reviewed | CA/US MeHg, tHg occurrence in Marine food-web organisms from the outer Bay of Fundy and Gulf of Maine |
| 95 | Chen et al. 2017. Metal Concentrations in Newcomer Women and Environmental Exposures: A Scoping Review, International Journal of Environmental Research and Public Health | 2017 | Review | CA/US/AU Pb, Cd, tHg, MeHg occurrence in Scoping review of 10 articles reporting blood Pb, Hg, Cd, cord-blood Hg/Pb, or urinary Hg concentrations among newcomer,… |
| 96 | Lima et al. 2017. Cadmium, lead, tin, total mercury, and methylmercury in canned tuna commercialised in São Paulo, Brazil, Food Additives & Contaminants: Part B, Vol. 10, No. 3, pp 185–191 | 2017 | Peer-reviewed | BR Cd, Pb, Sn, tHg, MeHg occurrence in Thirty canned-tuna samples from five commercial brands (the most-sold brands in the Campinas, São Paulo region), three batches… (n=30) |
| 97 | FDA 2017. Advice About Eating Fish — For Those Who Might Become or Are Pregnant or Breastfeeding and Children Ages 1 to 11 Years, U.S. FDA and U.S. EPA | 2017 | Government report | FDA/EPA fish consumption advice: MeHg exposure thresholds and guidance for pregnant women and vulnerable populations |
| 98 | Watanabe et al. 2017. Surveillance of Total Mercury and Methylmercury Concentrations in Retail Fish, Food Hygiene and Safety Science | 2017 | Peer-reviewed | JP tHg, MeHg occurrence in 210 retail fish samples across 19 fish species in Japan |
| 99 | C-C et al. 2016. Methylmercury varies more than one order of magnitude in commercial European rice, Food Chemistry | 2016 | Peer-reviewed | MeHg concentrations in rice flour (n=87) |
| 100 | Eagles-Smith et al. 2016. Spatial and temporal patterns of mercury concentrations in freshwater fish across the Western United States and Canada, Science of The Total Environment (2016, in press 2015) | 2016 | Peer-reviewed | US/CA tHg, MeHg occurrence in 96,310 individual fish records from 4,262 unique locations across 15 U.S. states + 3 Canadian provinces + 2… (n=96310) |
| 101 | Govarts et al. 2016. Combined Effects of Prenatal Exposures to Environmental Chemicals on Birth Weight, International Journal of Environmental Research and Public Health | 2016 | Peer-reviewed | BE tAs, Cd, Cu, Pb, Mn, MeHg, Tl occurrence in FLEHS II mother-child cohort: 248 uncomplicated singleton newborn-mother pairs recruited from the general Flemish population between August 2008… (n=248) |
| 102 | Hsi et al. 2016. Methylmercury Concentration in Fish and Risk-Benefit Assessment of Fish Intake among Pregnant versus Infertile Women in Taiwan, PLOS ONE | 2016 | Peer-reviewed | TW MeHg occurrence in Fish consumed in Taiwan and hair samples from pregnant and infertile women |
| 103 | Suvarapu et al. 2016. Determination of heavy metals in the ambient atmosphere: A review, Toxicology and Industrial Health 33(1): 79–96 | 2016 | Review | CN/IN/KR Pb, Cd, tHg, MeHg, Cr, Cr-VI, tAs, Ni, Al, Cu, Zn, Mn, V, Co occurrence in Narrative review of approximately 70 quality research papers on heavy metal determination in ambient air (TSPM, PM10, PM2.5)… |
| 104 | EFSA 2015. Statement on the benefits of fish/seafood consumption compared to the risks of methylmercury in fish/seafood, EFSA Journal 2015;13(1):3982, 36 pp. | 2015 | Government report | EU MeHg, tHg occurrence in Scenario-based risk-benefit assessment across 26 chronic dietary surveys from 17 EU Member States (Belgium, Bulgaria, Cyprus, Czech Republic,… |
| 105 | Ralston et al. 2014. Selenium Health Benefit Values: Updated Criteria for Mercury Risk Assessments, Archives of Environmental Contamination and Toxicology | 2014 | Peer-reviewed | MeHg concentrations and health risk assessment in seafood |
| 106 | Stasinos et al. 2014. The Bioaccumulation and Physiological Effects of Heavy Metals in Carrots, Onions, and Potatoes and Dietary Implications for Cr and Ni: A Review, Journal of Food Science | 2014 | Review | GR/LV/US Pb, Cd, tAs, Cr, Cr-VI, Ni, Al, tHg, MeHg, Cu, Zn, Mn, Co occurrence in Narrative review compiling open-field and greenhouse studies of heavy-metal bioaccumulation in three root and tuber vegetables (Daucus carota,… |
| 107 | Carroquino et al. 2013. Environmental Toxicology: Children at Risk, Encyclopedia of Sustainability Science and Technology, Chapter 11 (Springer) | 2013 | Peer-reviewed | Toxicology reference text on methylmercury: mechanisms of toxicity, target organs, and clinical manifestations |
| 108 | Centre for Food Safety 2013. The First Hong Kong Total Diet Study: Metallic Contaminants, Centre for Food Safety, Food and Environmental Hygiene Department, Government of the Hong Kong Special Administrative Region | 2013 | Government report | HK Al, Sb, Cd, Pb, MeHg, Ni, Sn occurrence in Hong Kong general adult population; 150 TDS food items purchased on 4 occasions (March 2010 to February 2011),… (n=1800) |
| 109 | Programme 2013. Minamata Convention on Mercury — Text and Annexes (2024 Edition), United Nations Environment Programme, Secretariat of the Minamata Convention on Mercury | 2013 | Government report | Minamata Convention on Mercury (2013): global treaty framework, mercury phase-down schedules, and food safety regulatory context |
| 110 | Olmedo et al. 2013. Determination of toxic elements (mercury, cadmium, lead, tin and arsenic) in fish and shellfish samples. Risk assessment for the consumers, Environment International | 2013 | Peer-reviewed | ES/MA/MR tHg, MeHg, Cd, Pb, Sn, tAs occurrence in Fresh, canned, and frozen fish and shellfish products representing 43 frequently consumed species/products in Andalusia, Spain; samples collected… (n=485) |
| 111 | Sears 2013. Chelation: Harnessing and Enhancing Heavy Metal Detoxification — A Review, The Scientific World Journal | 2013 | Peer-reviewed | US/CA Pb, Cd, iAs, tAs, MeHg, tHg, Sn occurrence in Narrative review; no primary measurements. |
| 112 | EFSA 2012. Scientific Opinion on the Risk for Public Health Related to the Presence of Mercury and Methylmercury in Food, EFSA Journal 2012;10(12):2985 | 2012 | Government report | EFSA 2012 scientific opinion on MeHg: PTWI of 1.3 µg/kg bw/week, neurological-endpoint dose-response, and dietary exposure from fish |
| 113 | Farina et al. 2011. Mechanisms of Methylmercury-Induced Neurotoxicity: Evidence from Experimental Studies, Life Sciences 89(15-16):555-563 | 2011 | Peer-reviewed | MeHg toxicological mechanisms, target organ effects, and dose-response evidence |
| 114 | Zealand 2011. The 23rd Australian Total Diet Study, Food Standards Australia New Zealand | 2011 | Government report | AU/NZ Al, tAs, iAs, Cd, Pb, tHg, iHg, MeHg occurrence in Ninety-two Australian foods and beverages, including tap and bottled water, represented by 570 composite samples; each composite used… (n=570) |
| 115 | JECFA 2011. Evaluation of Certain Contaminants in Food: Seventy-second Report of the Joint FAO/WHO Expert Committee on Food Additives (Lead, among others), WHO Technical Report Series 959 | 2011 | Government report | JECFA 72nd evaluation of lead: BMDL01 approach, withdrawal of PTWI, context for MeHg comparative regulatory standards |
| 116 | Grandjean et al. 2010. Adverse Effects of Methylmercury: Environmental Health Research Implications, Environmental Health Perspectives | 2010 | Peer reviewed review | JP/IQ/US MeHg, tHg occurrence in Peer-reviewed review of methylmercury toxicity, historical poisoning incidents, fish and seafood exposure pathways, and regulatory response; no original… |
| 117 | JECFA 2007. Evaluation of certain food additives and contaminants — Sixty-seventh report of the Joint FAO/WHO Expert Committee on Food Additives, WHO Technical Report Series 940 (Sixty-seventh meeting of JECFA, Rome, 20-29 June 2006) | 2007 | Government report | international Al, MeHg, tHg occurrence in Aluminium: total dietary exposure derived from market-basket and duplicate-diet surveys in adults (France, Germany, UK, USA, China), Total… |
| 118 | Committee on Toxicity of 2004. Updated COT statement on a survey of mercury in fish and shellfish, Advice on fish consumption, Annex 3 | 2004 | Government report | GB tHg, MeHg occurrence in COT/SACN review of the 2002 FSA fish and shellfish mercury survey, 1998 MAFF marine fish/shellfish survey context, and… |
| 119 | JECFA 2004. Evaluation of Certain Food Additives and Contaminants (Methylmercury), 61st Meeting of JECFA, WHO Technical Report Series 922 | 2004 | Government report | JECFA 61st evaluation of MeHg: PTWI of 1.6 µg/kg bw/week for neurological endpoints and fish-consumption exposure basis |
| 120 | EPA 2001. Methylmercury (MeHg) — IRIS Chemical Assessment Summary, U.S. Environmental Protection Agency, Integrated Risk Information System | 2001 | Government report | EPA IRIS toxicological review for methylmercury: oral reference dose, inhalation unit risk, and dose-response derivation |
| 121 | EPA 1999. Mercury Update: Impact on Fish Advisories, US EPA Fact Sheet EPA-823-F-99-016 | 1999 | Government report | US tHg, MeHg occurrence in 1,931 state-issued fish-consumption advisories in 40 states as of December 1998; cited fish-tissue mercury data drawn from EPA… (n=1931) |
| 122 | Codex 1995. General Standard for Contaminants and Toxins in Food and Feed (CXS 193-1995), Codex Alimentarius (Joint FAO/WHO Food Standards Programme) | 1995 | Government report | Codex General Standard for Contaminants (CXS 193): MeHg maximum levels across food commodities |
| 123 | Harada 1995. Minamata Disease: Methylmercury Poisoning in Japan Caused by Environmental Pollution, Critical Reviews in Toxicology | 1995 | Peer reviewed review | JP MeHg, tHg occurrence in Peer-reviewed review of Minamata disease, congenital Minamata disease, historical mercury contamination in Minamata Bay and the Shiranui Sea,… |
Page history
The five most recent substantive edits to this page. The full version history lives in git; when DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.
| Commit | Date | Description |
|---|---|---|
| b0f3d38 | 2026-06-12 | batch | corpus rescreen b04 old terminal skips |