Open data

The FiberUp fiber database

Name: FiberUp Fiber Database
Creator: Anthony Calise
License: https://creativecommons.org/licenses/by/4.0/

By Anthony Calise, maker of FiberUp. Updated October 17, 2026.

The food database behind the FiberUp app, published for anyone to use: 198 common foods with total fiber per typical serving and per 100 g, the soluble and insoluble split, percent of the daily value, and a low FODMAP flag. Values come from USDA FoodData Central and standard references, matched to servings people actually eat.

Use it in apps, research, classes, spreadsheets, or articles. The license is CC BY 4.0: you can copy, change, and use it commercially, as long as you credit FiberUp with a link to this page.

Download CSV JSON GitHub repository

JSON API

Static JSON over HTTPS. No key or sign-up, CORS is open, and responses are cached at the edge, so you can call it straight from a browser.

Endpoint	Returns
`GET /api/v1/foods.json`	All foods, highest fiber first, with license and update date
`GET /api/v1/foods/{slug}.json`	One food, for example `lentils`
`GET /foods/fiberup-foods.csv`	The same data as CSV

Example response for one food:

{
  "slug": "lentils",
  "name": "Lentils",
  "category": "Legume",
  "serving": "1/2 cup cooked",
  "serving_grams": 99,
  "fiber_g": 7.8,
  "fiber_per_100g": 7.9,
  "soluble_g": 1.2,
  "insoluble_g": 6.6,
  "daily_value_pct": 28,
  "low_fodmap_at_serving": false,
  "url": "https://fiberup.app/fiber-in/lentils/"
}

From JavaScript:

fetch('https://fiberup.app/api/v1/foods/lentils.json')
  .then((r) => r.json())
  .then((food) => console.log(food.name, food.fiber_g, 'g per', food.serving));

Fields

Field	Type	Meaning
`slug`	string	URL-safe id, also used in the per-food endpoint
`name`	string	Common food name
`category`	string	Vegetable, Fruit, Legume, Grain, Nut & Seed, Other
`serving`	string	Typical serving as people eat it, for example 1/2 cup cooked
`serving_grams`	number	Weight of that serving in grams
`fiber_g`	number	Total dietary fiber per serving, grams
`fiber_per_100g`	number	Total dietary fiber per 100 g
`soluble_g`	number	Soluble fiber per serving (approximate)
`insoluble_g`	number	Insoluble fiber per serving (approximate)
`daily_value_pct`	number	Percent of the 28 g FDA daily value
`low_fodmap_at_serving`	boolean	Whether the serving is low FODMAP
`url`	string	The food page on fiberup.app

What is in it

Vegetables: 60 foods, led by artichoke
Fruits: 39 foods, led by raspberries
Legumes: 17 foods, led by navy beans
Grains: 41 foods, led by whole wheat pasta
Nuts and Seeds: 21 foods, led by chia seeds
Other Foods: 20 foods, led by fiber one cereal

The highest-fiber foods per serving are fiber one cereal, all-bran cereal, chia seeds. Browse the full ranking on fiber in foods.

How to cite

Credit FiberUp with a link to fiberup.app/data. For a paper or report:

FiberUp Fiber Database (2026). Anthony Calise. https://fiberup.app/data/. Licensed CC BY 4.0.

For a web page, a line like Fiber data: FiberUp fiber database is enough.

Notes and limits

Fiber varies with variety, ripeness, and cooking. Values are rounded to one decimal.
Soluble and insoluble splits are approximate and come from USDA SR Legacy analyses where they exist.
The FODMAP flag reflects the listed serving, not the food in general.
General nutrition information, not medical advice.

Spotted an error? Email [email protected] or open an issue on GitHub.