Sunflower Seeds

Overview

Sunflower seeds are identified by EFSA Cd 2009 within the “oilseeds” category, which ranks among the highest-cadmium food categories in the EFSA European occurrence dataset. Sunflower is itself a well-documented efficient cadmium accumulator, to the point of being studied as a phytoremediation candidate for cadmium-contaminated soils.

Heavy metal contamination profile

Per-analyte snapshot derived from the machine-readable contamination_profile in the frontmatter above. data gap indicates the literature has been reviewed for this commodity-analyte combination and no usable occurrence data was found (a finding, not a placeholder). The Key sources column shows the top 2-3 contributing sources by year and sample size, with numbered wikilink aliases.

Why this commodity accumulates cadmium

Sunflower (Helianthus annuus) is one of several crop species with documented efficient cadmium uptake from soil, sufficiently so that the species has been investigated as a phytoremediation tool for cadmium-contaminated agricultural and industrial soils. The cadmium taken up by the plant partitions preferentially to the seeds, concentrating in the protein-rich seed tissue rather than staying in stems, leaves, or roots. Regional variation in finished-seed cadmium reflects the soil cadmium at the growing site, and cadmium levels in sunflower seeds from cadmium-rich soils can be materially higher than in seeds from lower-cadmium regions.

Ranges by source, region, and variety

Pending ingest of commodity-level occurrence data. EFSA 2009 Table 1 reports a mean cadmium concentration for oil seeds of 0.227 mg/kg, placing the oilseed category fifth-highest in the EFSA ranking of food commodity means by cadmium concentration. Sunflower-specific values within the oilseed category are expected to be at the upper end given the species’ accumulator profile; confirmation requires dedicated commodity-level ingests.

Processing effects

Pending. Cadmium in sunflower seeds partitions primarily to the protein fraction rather than to the oil fraction during cold-pressing, so sunflower oil typically carries less cadmium than whole seeds by a substantial factor; the press cake (oilseed meal) concentrates the cadmium remaining after oil extraction and is used in animal feed and in some plant-protein products.

Ingredient-derivative risk

Sunflower oil is a relatively low-cadmium derivative because cadmium partitions to the protein-rich press cake during oil extraction. Sunflower meal, sunflower protein concentrate, and sunflower butter (which retains the whole seed) carry cadmium at or above the whole-seed concentration. Plant-based protein products using sunflower protein as a primary ingredient deserve per-product characterization; the concentrating effect of protein isolation can produce derivative products with notably elevated cadmium.

Mitigation options

Pending. Cultivar selection, soil management, and choice of growing region are the primary mitigation levers on the production side. For downstream processors, sourcing from documented lower-cadmium growing regions and choosing oil over meal in formulation are the primary options.

Other metals of concern

Pending dedicated Pb, iAs, tHg, Ni, and Al ingest waves. The contamination_profile YAML block tracks all six metals; commodity-specific narrative for non-cadmium metals will populate when the corresponding source pages are ingested.

Regulatory limits that apply

• Codex Alimentarius — Maximum Levels for Cadmium in Food — Codex matrix-level Cd ML for oilseeds (pending ingest of CXS 193-1995).
• Commission Regulation (EU) 2023/915 cadmium maximum levels — EU Cd maximum level for linseeds and sunflower seeds is 0.50 mg/kg (500 ug/kg); oilseeds generally are 0.10 mg/kg (100 ug/kg), with separate rows for rape seed, peanuts/soybeans, mustard seed, and poppy seed.

FDA TDS FY2018–FY2020 source observations

FDA measured the prepared foods named below. Each row describes that food and preparation, not every form of this ingredient. Values are µg/kg (ppb) on the FDA sample basis. ND means not detected; it is not a measured zero. Reporting limits can vary between composites. FY2018-FY2020 TDS Elements Analytical Results

References

Works cited in this page’s text, in first-appearance order. See Sources for this page’s source inventory. Each title links to its source record, which carries the ingest receipt, the extracted values, and the file hash of the document it was built from.

1. Scientific Opinion of the Panel on Contaminants in the Food Chain on a request from the European Commission on cadmium in foodEFSA Panel on Contaminants in the Food Chain (CONTAM) · The EFSA Journal · 2009 · doi.org/10.2903/j.efsa.2009.980Government
2. FY2018-FY2020 TDS Elements Analytical ResultsU.S. Food and Drug Administration · FDA Total Diet Study · 2022 · www.fda.govDataset

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]*.

Update history

No substantive edit history is available in this build. The full commit record is available in git.