# データソースと帰属表示
Canonical: https://nutritionizm.com/ja/about/data-sources/
Last verified: 2026-10-26
Source: USDA FoodData Central, Open Food Facts, and Nutritionizm Open Data
License: USDA FoodData Central values are public domain (CC0 1.0); Nutritionizm compilation and plain-language text are licensed under CC BY 4.0 (attribution: link to Canonical URL).

## USDA FoodData Central (Public Domain)

Core generic food composition data is sourced from the U.S. Department of Agriculture (USDA), Agricultural Research Service, FoodData Central (https://fdc.nal.usda.gov/) (Foundation Foods and SR Legacy datasets). USDA FoodData Central data is in the public domain under CC0 1.0 Universal.

## Open Food Facts (ODbL Attribution)

Branded and international product nutrition data is sourced from Open Food Facts (https://world.openfoodfacts.org/), an open collaborative database of food products made available under the Open Database License (ODbL 1.0).

## Retail Store Product Records

Where a product is not yet covered by USDA FoodData Central or Open Food Facts, factual nutrition label values may be recorded from a retail store listing. Each such product page explicitly names the retail store source and the date the nutrition facts were retrieved.

## Use our data

- Open data downloads (JSON and CSV): https://nutritionizm.com/data/
- LLM index: https://nutritionizm.com/llms.txt
- Full LLM markdown corpus: https://nutritionizm.com/llms-full.txt
- Markdown twins: append .md to any indexed food, nutrient, research digest, glossary, or about URL.
- License and citation: USDA values are public domain (CC0 1.0). Nutritionizm compilation and plain-language digests are licensed under CC BY 4.0; attribute by linking to the canonical page URL.

## Medical and Dietary Disclaimer

All content on Nutritionizm is provided for informational and educational purposes only and does not constitute medical advice, diagnosis, or treatment.