Half and half

Overview

This ingredient stub was created during the FDA FY2018-FY2020 Total Diet Study element-results ingest so future source ingests have a stable destination for this food matrix. FDA reports this item as TDS Food 167, “Cream, half and half.” FY2018-FY2020 TDS Elements Analytical Results

Why this commodity accumulates heavy metals

Half and half is a dairy cream product consisting of equal parts whole milk and cream. Metals in dairy products reach the consumer primarily through the cow’s feed and water supply, following a parallel pathway to that described for whole milk and butter. Cadmium and lead absorbed from feed, pasture, and water are distributed in the cow’s body primarily to soft tissues (kidney, liver) and bone; the fraction partitioning into blood and subsequently into milk is small. Within milk itself, metals associate preferentially with the aqueous casein-whey fraction rather than the fat globule membrane. Because half and half is richer in fat than whole milk, the relative dilution of the aqueous protein fraction means that metal concentrations in half and half tend to be at or below those in whole milk on a volume basis. The FDA FY2018-FY2020 Total Diet Study reported all seven measured analytes (Cd, Cr, Ni, Pb, U, tAs, tHg) below the reporting limit across all 27 samples, which is consistent with the general understanding that dairy fat products are among the lowest-metal food matrices in the food supply FY2018-FY2020 TDS Elements Analytical Results.

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.

FDA TDS FY2018-FY2020 Evidence

The normalized row-level data for this TDS food 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 the reporting-limit column preserved separately; reported zeroes are not rewritten as <LOD unless a source explicitly says to do so. FY2018-FY2020 TDS Elements Analytical Results

Routing

This node is linked from the ingredient index and the FDA TDS source routing table.

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 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

Ranges by source, region, and variety

The FDA FY2018-FY2020 Total Diet Study measured half and half as TDS Food 167 with n=27 composite samples and found all seven analytes (Cd, Cr, Ni, Pb, U, tAs, tHg) at or below the reporting limit across the entire distribution, including the minimum and maximum 1. This uniformly non-detectable result is consistent across the US retail market as sampled by the TDS. European survey data for dairy cream products similarly show very low or below-limit concentrations for Pb and Cd. The EU maximum level for Pb in raw milk and heat-treated milk is 0.020 mg/kg (20 ppb); cream and half and half are governed by the general dairy framework, and the empirical data suggest concentrations well below this threshold. Regional variation driven by cattle sourcing or pasture geochemistry is unlikely to produce meaningfully elevated concentrations in this commodity given the low milk-to-fat partitioning ratio.

Processing effects

Half and half is produced by blending standardized cream with whole milk to achieve a fat content of approximately 10 to 18 percent, followed by pasteurization and homogenization. Pasteurization does not alter metal concentrations in any measurable way. Homogenization physically disrupts fat globules to distribute them uniformly but does not shift metal distribution between aqueous and fat phases in a way that would concentrate metals. Ultra-high-temperature (UHT) processing, used for shelf-stable half and half, also does not affect metal concentration. Storage in plastic or paper-based cartons rather than tin-lined cans means Sn migration is not a relevant pathway for this commodity.

Ingredient-derivative risk

Half and half is used primarily as a culinary ingredient (in coffee, sauces, and baking) rather than as a base for further concentrated derivatives. Reduction of half and half in cooking concentrates all dissolved constituents, but the starting metal concentrations are so low that even a fivefold reduction would remain far below relevant regulatory limits. Heavy cream and whipping cream, which have higher fat content than half and half, would if anything have even lower metal concentrations because of greater fat-phase dilution of the aqueous fraction.

Mitigation options

Sourcing levers

Because cattle feed and water are the primary metal exposure pathways for dairy cattle, sourcing milk from herds with documented low-Cd pasture environments provides the principal risk reduction lever. For a product where all measured analytes are at or below reporting limits, the practical mitigation headroom is already achieved under ordinary US dairy production conditions.

Agronomic levers

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

Processing levers

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

Formulation levers

Half and half is itself a formulation of milk and cream; no further formulation lever is applicable within the product definition.

Testing and QC levers

Routine lot-level testing of half and half for metals is unlikely to yield actionable findings given the uniformly below-detection results in the TDS. Monitoring at the milk-intake level at the farm or collection point provides more cost-effective quality assurance.

Packaging and storage levers

Half and half is packaged in plastic or paper-based cartons; Sn migration from tin-lined cans is not applicable. Storage temperature and duration affect microbiological quality but not metal concentration.

Regulatory limits that apply

The EU sets a maximum level of 0.020 mg/kg (20 ppb) for Pb in raw milk, heat-treated milk, and milk for the manufacture of dairy-based products, applied on the wet-weight basis EU Regulation 2023/915 maximum levels for contaminants in food. Cream and half and half are governed under the same general dairy framework. No specific EU maximum level for Cd in milk or cream as a distinct matrix is set; dairy products generally fall below the Cd limits that apply to other food categories. The United States does not set statutory maximum levels for Pb or Cd in milk or dairy cream products in Federal regulation, though FDA’s Total Diet Study provides ongoing surveillance. Codex Alimentarius general standards address Pb in milk at 0.020 mg/kg, consistent with the EU position Codex Alimentarius — Maximum Levels for Cadmium in Food.

Interpretation of source evidence

Source observations and population estimates are different. A non-detect supplies a reporting-limit bound for the tested composites. It does not show that this ingredient contains zero metal. Where a previous profile lacked matching source, species or basis support, its generic concentration has been withdrawn; the available source evidence is kept below.

Pb. FDA source observations are non-detects at the reporting limits below. They do not estimate a zero population concentration; other literature remains separate context.

Cd. FDA source observations are non-detects at the reporting limits below. They do not estimate a zero population concentration; other literature remains separate context.

tAs. FDA source observations are non-detects at the reporting limits below. They do not estimate a zero population concentration; other literature remains separate context.

tHg. FDA source observations are non-detects at the reporting limits below. They do not estimate a zero population concentration; other literature remains separate context.

Ni. FDA source observations are non-detects at the reporting limits below. They do not estimate a zero population concentration; other literature remains separate context.

Cr. FDA source observations are non-detects at the reporting limits below. They do not estimate a zero population concentration; other literature remains separate context.

U. FDA source observations are non-detects at the reporting limits below. They do not estimate a zero population concentration; other literature remains separate context.

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. 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.