How much fiber per day? (and why your app ignores it)

🥗 Radish · 6 min

Fiber barely provides any calories, so most counters leave it out. The result: you track your calories and protein to the gram, but ignore a benchmark that ANSES considers important. Here's how much to aim for per day, where to find it, and why it deserves a place in your tracking.

The benchmark: at least 25 g, target 30 g

For a healthy adult, ANSES sets a satisfactory fiber intake at 30 g per day, with a floor of "at least 25 g" according to its expert report. In practice, average intake in France sits closer to 20 g/day: there's real room to improve for many people, with nothing complicated involved.

What exactly is fiber?

Fiber is a carbohydrate that your digestive system doesn't absorb like the rest. It provides very little energy — around 2 kcal/g, and it is often counted as 0 in food tables (CIQUAL). That's exactly why calorie apps skip it: energy-wise, it "barely counts." Except its value isn't about energy.

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Why your calorie app ignores it

Most counters focus on calories and the three "energy" macros (protein, carbs, fat). Fiber falls into a blind spot: it is indeed a carbohydrate, but an unabsorbed one, so it barely enters the calorie count — and it isn't a micronutrient like vitamins or minerals either. A category of its own, really. Showing it requires a detailed, well-populated database, which many apps don't have. Radish relies on official tables (CIQUAL, USDA) to show the real micros and fiber, instead of stopping at calories.

Where to find your fiber

Fiber comes mostly from plants. To get close to 30 g without thinking about it:

Legumes: lentils, chickpeas, beans — among the densest sources.
Whole grains: whole-grain bread, oats, brown rice, whole-wheat pasta.
Fruits and vegetables: with the skin when possible (apple, pear), plus green and cruciferous vegetables.
Nuts and seeds: almonds, walnuts, chia or flax seeds.

A bowl of oats, a serving of lentils and a few pieces of fruit through the day, and you're already well on your way.

How to track it without the hassle

No mental math needed: you just need an app that shows fiber next to calories. Spot the days you're below 25 g, add a serving of legumes or a piece of fruit, and the 30 g benchmark quickly becomes a habit rather than a calculation.

FAQ

How much fiber per day for an adult?

ANSES recommends at least 25 g per day, with a target of 30 g for a healthy adult. It's a satisfactory intake, not a maximum.

Can you eat too much fiber?

Ramping up intake very fast can cause digestive discomfort. The simple move: increase gradually and drink enough water. With a digestive condition, seek medical advice.

Does fiber count toward calories?

Very little: about 2 kcal/g, and it's often counted as 0 in food tables. Its value isn't caloric, which is why many apps ignore it.

How do I track my fiber easily?

Radish shows your fiber next to calories and macros, based on official tables (CIQUAL, USDA), free and offline.

Remember: at least 25 g, target 30 g of fiber per day, mostly from legumes, whole grains, fruits and vegetables. To keep it in view, Radish shows it next to your calories. nutri-track.fr

General information, not medical advice.

🔎 Methodology & sources. Every nutrition figure in this article is cross-checked against official sources (ANSES, EFSA, WHO, CIQUAL/USDA, French Public Health agency), and health topics are reviewed before publication against our internal reference framework. See our full methodology →