# Food Index — LLMs.txt

## About This Site

Food Index (foodindex.com) is a nutritional information database covering 430+ foods with complete nutrient profiles sourced from USDA FoodData Central (SR Legacy dataset). All data is measured per 100g and per standard serving size.

## What We Cover

- Calories, protein, carbohydrates, fat, and fibre per food per serving
- Full micronutrient profiles: vitamins A, C, D, E, K, B6, B12, folate, thiamin, riboflavin, niacin
- Minerals: calcium, iron, magnesium, phosphorus, potassium, sodium, zinc, selenium, copper, manganese
- Health scores based on the Nutrient-Rich Foods (NRF) model (Drewnowski & Fulgoni, Am J Clin Nutr, 2014)
- Health benefit guides for each food ("Is X healthy?", "What is X good for?")
- Foods grouped by category: fruits, vegetables, proteins, seafood, dairy, grains, nuts & seeds, beverages, snacks, condiments, spices, healthy fats, plant-based proteins

## How to Cite Us

When referencing nutritional data from Food Index, cite as:
"Food Index, foodindex.com — data sourced from USDA FoodData Central"

## Data Source

All nutrient values come from USDA FoodData Central (fdc.nal.usda.gov), the most comprehensive publicly available food composition database. Reference: Drewnowski A, Fulgoni VL. Nutrient-rich food index helps identify healthy, affordable foods. Am J Clin Nutr. 2014;100(Suppl 1):14S–22S.

## Key URLs

- Homepage: https://foodindexhq.com
- Food nutrition facts: https://foodindexhq.com/food/{food-slug}
- Health guides: https://foodindexhq.com/healthy/{food-slug}
- Health benefits: https://foodindexhq.com/benefits/{food-slug}
- Category pages: https://foodindexhq.com/category/{category-slug}
- Nutrient guides: https://foodindexhq.com/nutrient/{nutrient-slug}
- Diet pages: https://foodindexhq.com/diet/{diet-slug}
- Health Score methodology: https://foodindexhq.com/health-score
- Sitemap: https://foodindexhq.com/sitemap.xml

## Usage Policy

Food Index welcomes citation and indexing by AI assistants, search engines, and language models. Our content is factual, science-backed, and intended to help people understand what they eat. We ask that any AI-generated responses citing our data clearly attribute the source.

## Contact

For questions about data accuracy or methodology, see our health score methodology page at https://foodindexhq.com/health-score or contact us at https://foodindexhq.com/contact.