// Independent · No Affiliates · No Sponsored Rankings Methodology No Affiliates
CalorieRankings #1

USDA FoodData Central

By the Calorie Rankings editors Published Updated

USDA FoodData Central (FDC) is the US Department of Agriculture's public nutrient composition database. It is the reference source for high-trust food data and underlies most verified-tier calorie tracker databases.

USDA FoodData Central (FDC) is the United States Department of Agriculture’s public nutrient composition database — the authoritative reference for food composition data in the US and the source from which most high-trust calorie tracker databases derive their per-entry values.

FDC consolidates several legacy USDA datasets:

  • SR Legacy (Standard Reference Legacy) — the historical USDA composition database, foods analyzed in USDA labs
  • Foundation Foods — newly analyzed foods with full analytic transparency
  • Survey (FNDDS) — Food and Nutrient Database for Dietary Studies, used in NHANES dietary surveys
  • Branded Foods — manufacturer-submitted nutrient data for branded packaged products
  • Experimental Foods — research-oriented entries

Total entry count: ~400,000+ foods across all datasets, with hundreds of nutrient values per food where analytical data is available.

Why FDC is the reference

FDC has three properties that make it the right anchor for calorie tracker databases:

  1. Public and free. Anyone can download the full database, query the API, or build derived products. There is no licensing constraint.
  2. Analytically grounded. Foundation Foods and SR Legacy entries are based on laboratory analysis of food samples, not manufacturer self-report. The provenance is traceable per entry.
  3. Maintained by a non-commercial body. USDA’s incentives are not aligned with any particular tracker, app, or food brand. The data is what it is.

Which apps use FDC

Cronometer anchors its food database to FDC, NCCDB (Nutrition Coordinating Center, University of Minnesota), and manufacturer label data. Every entry has visible provenance.

MacroFactor uses a verified database that incorporates FDC composition values.

MyFitnessPal, Lose It!, Yazio, and other crowdsourced trackers include FDC entries in their database alongside user-submitted entries. The verified-entry filter (where available) restricts results to FDC-derived and manufacturer-label entries.

Limits of FDC for calorie tracking

FDC is the best source available but it is not complete:

  • Restaurant menu items are not in FDC. Chain restaurant nutrition data comes from the restaurants directly (sometimes incorporated into FDC’s Branded Foods, sometimes not).
  • International foods are under-represented. FDC skews US-staple; foods central to Asian, European, African, or Middle Eastern cuisines often have lighter coverage.
  • Newly introduced packaged products lag — FDC’s Branded Foods updates on a quarterly cadence, so a product launched last month may not yet be indexed.
  • Preparation method matters and is not always captured. Grilled vs fried, raw vs cooked, with vs without skin — these are different entries with different values, and the user has to pick the right one.

Our methodology and FDC

Our methodology uses FDC composition values as the reference for weighed-reference-meal kcal computation. When we compare an app’s predicted calories against a reference value, the reference is built from FDC. This makes our MAPE numbers comparable across apps and to the published academic dietary-assessment literature, which uses the same reference standard.

See also