Overview
This page is a scaffolded entry for HMTc Taxonomy v2.0 Category 3 (Grains, Cereals, and Rice Products), Row 1: Flour (wheat, corn, other). Studies for this row are still being read. Where a section is empty, the row has not yet accumulated contributing sources of the required kind.
Reading guide
Legal, regulatory and retailer teams can use the cited measurements, applicable limits and study limitations to assess the evidence for this category.
Quality teams can examine product form, measurement basis and sources of variation. Journalists and researchers can follow each reference to the original findings and methods.
Related tools and pages: heavymetalcertified.com · methodology
Evidence summary
Sources for this row will be listed here once they are catalogued.
Source Evidence Inventory
Sources for this row will be listed here once they are catalogued.
Supporting evidence and scope
Broader-scope sources for this row will be listed here when they are catalogued.
Federal/Regulatory Limits vs Field Findings
Regulatory limits for this row will be listed here once they are catalogued.
Controls and mitigation
Practical interventions to reduce heavy-metal load in this row, ordered by impact magnitude. Each lever names the magnitude of the effect with a cited source; cross-links to dedicated Mitigation pages where they exist.
- Sourcing levers — Not yet catalogued.
- Agronomic levers — Not yet catalogued. (See Agronomic mitigation for general agronomic mitigation context.)
- Processing levers — Not yet catalogued. (See Processing mitigation.)
- Formulation levers — Not yet catalogued. (See Formulation mitigation.)
- Testing and QC levers — Not yet catalogued. (See Testing and quality-control mitigation when published.)
- Packaging and storage levers — Not yet catalogued. (See Packaging and storage mitigation when published.)
How standards math uses this page
HMT&C certification thresholds for this row are developed under the certification program at heavymetalcertified.com, not on this page. The row-standard for this row is an aggregate computed from the contributing source pool in the row’s native finished-product basis; it is not a per-source decoration of any single value cited on this page. This public page reports literature evidence only.
Historical recalls and enforcement
Public regulatory events for this row, such as recalls and import alerts, will be listed here as they are catalogued.
Methodology
This page reports what the cited sources say about heavy-metal concentrations in flour (wheat, corn, other). Speciation is non-substitutable (iAs vs tAs, MeHg vs tHg, Cr-VI vs total Cr). Basis is preserved (finished-product as sold unless the source specifies otherwise; see each row for the basis label). Non-detect handling follows each source’s reporting convention. Pooling is avoided across LOD/LOQ, period, geography, and analytical-basis differences. HMT&C certification thresholds for products in this row are developed under the certification program at heavymetalcertified.com, not on this page; this public page reports literature evidence only.
The applicable regulatory jurisdictions for this row are: FDA, EU, Codex.
Sources
Sources for this row will be listed here once they are catalogued.
Sources
Source records associated with this topic. Inclusion does not establish that every finding applies to this product or ingredient. References above identify works cited in the text.
| # | Citation | Year | Type | Used on this page for |
|---|---|---|---|---|
| 1 | Asadi et al. 2025. Human health risk assessment of arsenic and potentially toxic elements exposure in bread and wheat flour in Northeast Iran, PLoS ONE 20(7): e0327652 | 2025 | Peer-reviewed | IR tAs, Al, Cr, Cd, Ni, Pb, tHg, Fe, Zn, Cu, Co, V occurrence in Flour, dough, and bread from 90 bakeries across five city regions (North, South, East, West, Central) in Mashhad,… (n=270) |
| 2 | Salahel et al. 2025. Assessment of toxic heavy metals in commonly consumed foods in Egypt and their implications for public health and safety, Scientific Reports | 2025 | Peer-reviewed | EG Pb, Cd, Cr, tAs occurrence in Fifty-four food and beverage samples collected January-December 2022 from local markets in Qena Governorate, southern Egypt: beverages (n=20;… (n=54) |
| 3 | Gül et al. 2024. Effects of cadmium and lead stress on quinoa (Chenopodium quinoa Willd.) plant growth and antioxidant enzyme activities, Turkish Journal of Nature and Science | 2024 | Peer-reviewed | TR Cd, Pb concentrations |
| 4 | Wu 2024. Contamination of Heavy Metal(Loid)S in Cereals, Vegetables, and Legumes Purchased from Local Markets of Jiaozuo, China and The Associated Health Risk Assessment, International Journal of Natural Resources and Environmental Studies, 2(1): 180-200 | 2024 | Peer-reviewed | CN Pb, Cd, Cr, tAs, tHg, Ni, Cu, Zn occurrence in 244 retail food samples purchased from 13 sampling points (6 supermarkets, 6 farmers’ markets, 1 wholesale market) across… (n=244) |
| 5 | Althobiti et al. 2021. An Isotopic Study of Bio-accessible Lead in Wheat, Miswak Toothbrush and Miswak Fruit Using the Continuous On-line Leaching Method with Inductively Coupled Plasma Mass Spectrometry, Atomic Spectroscopy | 2021 | Peer-reviewed | SA Pb, Cd occurrence in Wheat samples from Saudi Arabia/Dubai contexts plus Miswak toothbrush and Miswak fruit samples evaluated for bio-accessible lead isotope… (n=7) |
| 6 | Pompa et al. 2021. Evaluation and Dietary Exposure Assessment of Selected Toxic Trace Elements in Durum Wheat (Triticum durum) Imported into the Italian Market: Six Years of Official Controls, Foods | 2021 | Peer-reviewed | IT/AU/CA Cd, Pb, tHg concentrations (n=346) |
| 7 | Mania et al. 2020. Assessment of exposure to nickel intake with selected cereal grains and cereal-based products, Roczniki Panstwowego Zakladu Higieny (Annals of the National Institute of Hygiene) | 2020 | Peer-reviewed | PL/EU Ni occurrence in Polish market samples collected in 2019-2020: 5 cereal grains, 11 pasta samples, 13 flours, 12 groats, 10 flakes,… (n=56) |
| 8 | Maccaferri et al. 2019. A high-density, SNP-based consensus map of tetraploid wheat as a bridge to integrate durum and bread wheat genomics and breeding, Nature Genetics | 2019 | Peer-reviewed | Cd concentrations from the cited dataset |
| 9 | Wang et al. 2019. Dietary Lead Exposure and Associated Health Risks in Guangzhou, China, International Journal of Environmental Research and Public Health | 2019 | Peer-reviewed | CN Pb occurrence in Food safety risk monitoring samples from Guangzhou, China, collected during 2014-2017 across 27 food categories; consumption inputs came… (n=6339) |
| 10 | Slepecka et al. 2017. Evaluation of cadmium, lead, zinc and copper levels in selected ecological cereal food products and their non-ecological counterparts, Current Issues in Pharmacy and Medical Sciences 30(3):147-150 | 2017 | Peer-reviewed | PL Cd, Pb, Zn, Cu occurrence in 10 ecological and 10 non-ecological cereal products (flour, flakes, bran) from different producers and regions of Poland; product… (n=20) |
| 11 | Baxter et al. 2015. Total Diet Study of metals and other elements in food, Food and Environment Research Agency report for the UK Food Standards Agency, Fera report 15/06, project FS102081 | 2015 | Government report | GB Al, Sb, tAs, iAs, Ba, Cd, Cr, Cu, Pb, Mn, tHg, Mo, Ni, Pd, Pt, Sn, Tl, Zn occurrence in 3312 retail food samples from 24 UK locations, combined into 138 prepared-as-consumed food-category composites and 28 food-group composites (n=3312) |
| 12 | Jaishree et al. 2015. Heavy metal accumulation in vegetables irrigated with industrial effluent, International Journal of Innovative Research in Science, Engineering and Technology | 2015 | Peer-reviewed | IN Cd, Ni, Pb, Cu, Cr, Mn, Zn occurrence in Vegetables and wheat grown under industrial-effluent irrigation conditions in India |
| 13 | Islam et al. 2014. Heavy Metals in Cereals and Pulses: Health Implications in Bangladesh, Journal of Agricultural and Food Chemistry | 2014 | Peer-reviewed | BD Cr, Ni, Cu, Zn, tAs, Cd, Pb occurrence in Composite samples of rice, wheat, maize, lentil, and black gram collected from agricultural fields in the Bogra district… (n=144) |
| 14 | Health Canada Bureau of 2008. ARCHIVED — Health Canada Requests Information from Industry on the Use of Aluminum-Containing Food Additives, Health Canada, Food Directorate, Bureau of Chemical Safety | 2008 | Regulation | Contribution to this topic remains under review; see the source record for its reported scope. |
| 15 | Health Canada Bureau of 2008. ARCHIVED — Health Canada Review of Dietary Exposure to Aluminum, Health Canada, Food Directorate, Bureau of Chemical Safety | 2008 | Regulation | Contribution to this topic remains under review; see the source record for its reported scope. |
Update history
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