Source register

Every food composition database we currently ingest, with publisher, version, licence, and the date of the most recent refresh.

Each source is re-pulled at a stated cadence: CoFID annual; Swedish quarterly when feasible; Norwegian annual; Canadian on irregular publisher updates. Refresh runs are logged with row counts and rejection counts. The "Last refreshed" column below shows the most recent successful run on the production system.

Source	Publisher	Licence	Foods	Last refreshed
CoFID 2021	UK Food Standards Agency / Public Health England	Open Government Licence v3.0	2877	2026-04-28
Swedish Livsmedelsdatabasen	Livsmedelsverket (Swedish Food Agency)	Open data terms	2575	2026-04-28
Norwegian Matvaretabellen	Mattilsynet (Norwegian Food Safety Authority)	CC BY 4.0	2121	2026-04-28
Canadian Nutrient File	Health Canada	Open Government Licence (Canada)	5690	2026-04-28

Source-specific notes:

CoFID 2021: RAE derived from retinol + β-carotene/12. AOAC fibre preferred over NSP where both reported.
Swedish Livsmedelsdatabasen: Provides direct free-sugars values. RAE derived from retinol + β-carotene/12.
Norwegian Matvaretabellen: Vitamin A reported as RAE directly; salt and sodium both reported.
Canadian Nutrient File: Vitamin E summed from α/β/γ/δ tocopherol fractions. Carbohydrate by difference, converted to available carbohydrate at the transform layer.

Legacy and curated tiers

McCance & Widdowson legacy. Where a CoFID 2021 record has not yet superseded the older McCance & Widdowson value, the legacy row remains visible to users with the historic UK 3.75 kcal/g carbohydrate factor applied (see the Energy section). These rows are progressively retired as CoFID coverage expands.

Nibblr-curated. A small number of foods (UK retail-specific items, regional ingredients absent from any government source) are curated by Nibblr. Each curated row carries a "curated by Nibblr" attribution and is reviewed by a registered nutritionist before promotion.

Frida v5.5 (DTU, Denmark). Implemented in the ingestion layer but not yet promoted to production. We do not surface Frida values to users until the cross-source matching for Danish records has had a full nutritionist-led review.