Food Index data

Name: FatTonic Food Index
Creator: FatTonic
License: https://creativecommons.org/licenses/by/4.0/

Version 1.0.0 · 2 Oct 2026 · score model v1

200 foods, the formula, and where every number comes from. Free to reuse with credit.

Download

foods.csv · foods.json · datapackage.json

The formula

GL    = GI × (carbs − fiber) ÷ 100
Score = 100 − 2.2·GL − 0.8·sugar
        − 8·processing + 1.6·fiber
        + 0.7·protein

Amounts are per serving, in grams; processing is 0–3. GL is rounded to a whole number and the score is kept within 1–100. Bands: 80+ Excellent, 60+ Good, 40+ Moderate, 20+ Poor, below 20 Avoid.

Where each input comes from

Input	Source	Licence
Carbs, sugar, fiber, protein, fat	USDA FoodData Central, one record per food, linked on its page. 191 of 200 foods.	Public domain
Glycemic index	37 foods are not tested: too little carbohydrate (University of Sydney GI FAQ), so the score assumes a low value. For the other 163, the per-food source is not yet recorded.	Not licensed by FatTonic
Serving, processing level	FatTonic	CC BY 4.0
Glycemic load, score, band	Computed with the formula above	CC BY 4.0

Nutrient values agree with their USDA record to within 1 g per serving. Foods without a record yet: Stevia, Muesli, Gnocchi, Udon Noodles, Coconut Sugar, Farro, Special K, Digestive Biscuits, Cassava (Boiled).

Licence

FatTonic's own layer is CC BY 4.0. Credit: “FatTonic Food Index, https://fattonic.com/data/”. USDA values are public domain. Glycemic index values are excluded.

Changelog

1.0.0 · 2 Oct 2026	USDA record on 191 foods; 92 values in 62 foods corrected to their record. Glycemic index basis per food. CSV, JSON, data package. CC BY 4.0.
0.3 · 28 Sep 2026	Per-food sources field and JSON export.
0.2 · 31 Aug 2026	200 foods.
0.1 · 16 Jul 2026	61 foods, score model v1.

Found an error? hello@jukkablomberg.com