Oranges

Overview

FSA/Fera measured this ingredient or non-infant-specific food composite in Table 6 of the FS102048 survey. Exact concentration values remain in progress until Table 6 is parsed into structured ingredient rows with less-than and semi-quantitative flags preserved. Survey of metals in commercial infant foods, infant formula and non-infant specific foods

Why this commodity accumulates heavy metals

Oranges are one of the lowest-risk food categories for heavy metal accumulation. The thick, waxy peel that characterizes citrus fruit provides a physical barrier that substantially limits atmospheric Pb deposition from reaching the edible flesh; Pb that deposits on the outer peel surface is removed with the peel during normal peeling and juicing operations. Root uptake of Cd and Pb from soil occurs in citrus trees as in other fruit trees, but the transfer factor from root to fruit flesh is low; citrus trees are not recognized accumulators of Pb or Cd, and the physiological buffering of the fruit through the tree’s vascular system results in low concentrations in the flesh. Mercury is not a significant concern in citrus grown under typical commercial conditions. Inorganic arsenic is similarly not a significant analyte in citrus flesh. FDA TDS FY2018-FY2020 data FY2018-FY2020 TDS Elements Analytical Results for raw orange (TDS Food 79, n=27) confirm this low-risk profile: Pb, Cd, Cr, and tHg were all at or below detection limits in nearly all samples, with only Ni (max 87 ppb), U (max 6.5 ppb), and tAs (max 6.7 ppb) detected at the high end of the distribution.

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.

Synthesis basis and censoring treatment

The earlier profile carried orange lead, cadmium, total mercury, and chromium at [0, 0] with a p95 of 0. Those zeros reflected the FDA Total Diet Study reporting below-limit results as literal zeros: lead below the 4 ppb reporting limit, total mercury and chromium below 1 ppb and 50 ppb respectively, and cadmium below 1 ppb in 26 of 27 samples with a single 1.2 ppb detect (FDA 2022). Each cell is now treated as left-censored at its reporting limit, with dry-weight sources converted to fresh weight using the orange edible fraction of 0.13.

European retail-citrus data show low but real concentrations. Czech et al. 2021 measured whole-orange lead at about 10 ppb and cadmium at about 0.34 ppb fresh weight, Mania et al. 2021 placed non-berry fresh-fruit lead at 6 to 15 ppb with a P90 of 22 to 29 and mercury at a middle-bound mean of 0.3 to 1.7 ppb, and Lee et al. 2023 detected total chromium in every Korean fresh-fruit sample near 31 ppb fresh weight. Ethiopian open-market orange from Mekonnen et al. 2024, reporting 0.147 mg/kg cadmium and 0.759 mg/kg chromium on a dry-weight basis (about 19 and 99 ppb fresh weight after conversion), is carried as a developing-market tail rather than the central value. Chromium values are total chromium, not Cr-VI.

Routing

This node is linked from the ingredient index and source routing list.

Contamination Profile State

Per-analyte state — populated, in progress, or declared data gap — is carried authoritatively in the machine-readable contamination_profile frontmatter and the contamination-profile table above. Ingredient-level values belong here; finished-product values belong on the relevant product-category page.

FDA TDS FY2018-FY2020 Evidence

FDA’s FY2018-FY2020 Total Diet Study dataset includes this page’s routed matrix as TDS Food 79, “Orange, raw.” The normalized row-level data is stored in data/evidence/fda_tds_fy2018_2020_element_results_samples.csv, with per-food/per-analyte summaries in data/evidence/fda_tds_fy2018_2020_summary_by_food_analyte.csv. Concentrations are retained as FDA reported them, with reporting limits preserved separately; reported zeroes are not rewritten as <LOD without a source-specific rule. FY2018-FY2020 TDS Elements Analytical Results

FDA TDS FY2018-FY2020 Occurrence Values

FDA Total Diet Study FY2018-FY2020 reports prepared/composite-food concentration distributions for this ingredient as TDS food “Orange, raw” (FY2018-FY2020 TDS Elements Analytical Results). Values are in ppb-equivalent on the basis FDA reported. The full sample-level data are stored in data/evidence/fda_tds_fy2018_2020_element_results_samples.csv; per-analyte distributions in data/evidence/fda_tds_fy2018_2020_summary_by_food_analyte.csv. These distributions count as one source under Persistent Wiki Ingest Rule synthesis discipline; numerical values stay in body scratch until a second independent source is integrated.

Ranges by source, region, and variety

The FDA TDS FY2018-FY2020 dataset FY2018-FY2020 TDS Elements Analytical Results for raw orange (n=27) provides the most comprehensive US monitoring baseline in the current corpus and shows that Pb, Cd, Cr, and tHg are effectively absent (at or below detection limits across virtually all samples). Ni was detected at concentrations ranging from 0 to 87 ppb; tAs was detected in some market samples, reaching a maximum of 6.7 ppb. The FSA FS102048 survey Survey of metals in commercial infant foods, infant formula and non-infant specific foods provides additional occurrence context for UK dietary monitoring. Variation between growing regions for the analytes of concern in this category (Ni, tAs at low concentrations) is not documented in the current corpus with sufficient granularity to separate geographic from varietal effects.

Processing effects

Peel removal before consumption or before juice extraction eliminates the outer tissue that carries the highest surface Pb deposition risk, though Pb in orange flesh is already below detection limits in US monitoring data. Peeling and consumption of the flesh without the peel (normal commercial and home practice) is therefore already the effectively lowest-metal consumption mode for this commodity. Drying to produce dried orange peel (used in confectionery and flavoring) concentrates analytes on a wet weight basis proportionally to moisture loss, and surface deposition on the peel is concentrated rather than removed. Juicing is addressed on the Orange juice page.

Ingredient-derivative risk

Fresh orange segments and commercially produced orange purée carry approximately equivalent metal profiles on a moisture-corrected basis, since purée production does not concentrate metals beyond the reduction in water content during the puréeing step. Dried orange peel and orange peel powder (used as a food ingredient and flavoring) concentrate any surface Pb and other metals present in the peel; these derivatives warrant separate occurrence characterization and should not be extrapolated from the flesh-based data that dominate the current corpus. Orange extract and orange oil (cold-pressed or steam-distilled) carry negligible metals because the extraction process is selective for lipophilic volatile compounds. Orange juice as a separate product category is covered on Orange juice.

Mitigation options

Sourcing levers

Given the uniformly low metal concentrations documented in orange flesh, commercial sourcing decisions for fresh oranges are not a material lever for metal-content management in normal agricultural practice. For dried peel or peel-containing derivatives, sourcing from growing regions with lower atmospheric Pb deposition (non-urban, non-industrial areas) reduces peel Pb risk.

Agronomic levers

No quantified data on this lever in the current corpus; section will be expanded when relevant evidence is ingested.

Processing levers

Standard peel removal before consumption or processing of the flesh eliminates the primary surface-deposition risk. For peel-containing products, washing the peel before processing removes the most readily desorbed surface Pb.

Formulation levers

No quantified data on this lever in the current corpus; section will be expanded when relevant evidence is ingested.

Testing and QC levers

Given the very low metal concentrations in orange flesh documented across monitoring programs, routine heavy metal testing of fresh orange is of low priority for most supply chain applications. For products incorporating orange peel (marmalade, flavoring extracts, supplements), Pb testing of the peel-derived ingredient provides relevant assurance.

Packaging and storage levers

No quantified data on this lever in the current corpus; section will be expanded when relevant evidence is ingested.

Regulatory limits that apply

European Union Regulation (EU) 2023/915 EU Regulation 2023/915 maximum levels for contaminants in food sets a maximum level of 0.10 mg/kg for Pb and 0.050 mg/kg for Cd in fresh fruit on a wet weight basis, applicable to oranges. The Codex General Standard for Contaminants and Toxins in Food and Feed (CXS 193-1995) sets Pb maximum levels for fresh fruit. No specific iAs or tHg regulatory limit applies to fresh citrus fruit. Orange juice (the derived product) is subject to a more stringent EU Pb limit of 0.050 mg/kg; see Orange juice and EU Regulation 2023/915 maximum levels for contaminants in food for the juice-specific framework.

References

Works cited in this page’s text, in first-appearance order. This is not the full corpus for this page; it is only what the prose above draws on. The complete set of sources is listed under Sources below. 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. Survey of metals in commercial infant foods, infant formula and non-infant specific foodsFood Standards Agency / Fera Science Ltd · UK Food Standards Agency report FS102048 · 2016 · www.food.gov.ukGovernment
2. FY2018-FY2020 TDS Elements Analytical ResultsU.S. Food and Drug Administration · FDA Total Diet Study · 2022 · www.fda.govDataset
3. Bioactive Substances, Heavy Metals, and Antioxidant Activity in Whole Fruit, Peel, and Pulp of Citrus FruitsCzech A, Malik A, Sosnowska B, and Domaradzki P · International Journal of Food Science · 2021 · doi.org/10.1155/2021/6662259Review
4. The content of lead, cadmium, arsenic, mercury and tin in fruit and their products based on monitoring studies – exposure assessmentMania M, Rebeniak M, Chabros E, Orshulyak O, and Postupolski J · Roczniki Państwowego Zakładu Higieny (Annals of the National Institute of Hygiene) · 2021 · doi.org/10.32394/rpzh.2021.0188Review
5. Occurrence and health risk assessment of antimony, arsenic, barium, cadmium, chromium, nickel, and lead in fresh fruits consumed in South KoreaLee J, Hwang I, Park YS, and Lee DY · Applied Biological Chemistry · 2023 · doi.org/10.1186/s13765-023-00799-xReview
6. Health Risk Assessment of Potentially Toxic Elements Contamination of Commonly Consumed Fruits in Bahir Dar Town, Northwest EthiopiaMekonnen BA, Yizengaw MG, Kassahun H, and Ketema G · International Journal of Food Science · 2024 · doi.org/10.1155/2024/6677324Review

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

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and 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.