The European Fiber Gap: Why Almost No One in Europe Gets Enough Fiber

The European Food Safety Authority recommends at least 25 grams of dietary fiber per day.¹ The German Nutrition Society goes further, recommending 30 grams. The British Nutrition Foundation says 30 grams. France says 25-30 grams.

Yet across the continent, average intake hovers between 16 and 24 grams. Not a single European country meets its own guidelines.

This is the fiber gap. It is wide, well-documented, and almost completely ignored.

How big is the European fiber gap?

The most comprehensive pan-European data comes from Stephen et al. (2017), published in Nutrition Research Reviews, which compiled dietary fiber intake across 33 countries.² The findings are consistent: European men consume an average of 18-24g per day, women 16-20g per day. Every country falls short.

Germany, one of Europe’s most health-conscious markets, averages approximately 22g per day against a national recommendation of 30g. That is a deficit of 8g every single day, or roughly 2.9 kilograms of missing fiber per year per person.

→ Read: How Much Fiber Do You Actually Need?

Spain’s numbers are similar. The UK’s are worse.

Perhaps most striking: only 3% of European consumers can correctly identify their country’s recommended daily fiber intake. The gap is not just in diet. It is in awareness.

What does dietary fiber actually do?

Dietary fiber is the non-digestible part of plant-based food. It passes through the stomach and small intestine largely intact, reaching the colon where it feeds beneficial gut bacteria and adds bulk to stool.

But that understates what fiber does. The clinical evidence connects adequate fiber intake to reduced risk of cardiovascular disease, improved blood sugar regulation, lower rates of colorectal cancer, healthy weight management, and normal bowel function. The European Food Safety Authority has specifically authorized the claim that chicory inulin, a soluble prebiotic fiber, contributes to maintenance of normal defecation by increasing stool frequency, at a dose of 12g per day.³

That authorized claim matters. In a market full of vague wellness promises, it is one of the few statements a European food supplement can legally make. For a full breakdown of how EFSA health claims work and what they mean for consumers, see our guide to EFSA health claims explained.

Why does the fiber gap matter now more than ever?

The rise of GLP-1 receptor agonist medications, including semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro), has created an entirely new population for whom fiber intake is clinically urgent.⁴

GLP-1 medications work by slowing gastric emptying and reducing appetite. They are highly effective for weight loss and blood sugar control. But their mechanism of action creates three compounding problems for fiber intake:

Reduced food volume. GLP-1 users eat significantly less food overall. Less food means less fiber, even when dietary quality stays the same.

Reduced thirst signaling. The medications suppress thirst alongside appetite. Dehydration worsens constipation, exactly the condition fiber is meant to prevent.

Nausea from high-fiber foods. High-fiber foods tend to be high-volume: legumes, whole grains, vegetables. These are the foods most likely to trigger nausea in GLP-1 users, particularly during dose escalation. The foods that would help are the ones patients can least tolerate.

The result is a vicious cycle. The people who need more fiber are physiologically set up to get less of it. And with the upcoming shift to oral GLP-1 pills that require a 30-minute fasting window, even the timing of fiber supplementation becomes more complicated.

How common is constipation among GLP-1 users?

Constipation affects 5-24% of GLP-1 medication users depending on the specific drug, dose, and study methodology.⁵ For semaglutide (the active ingredient in Ozempic and Wegovy), the clinical trial data reports constipation rates at the higher end of that range during dose escalation phases.

A 2024 analysis of GLP-1 side effect duration found a median constipation duration of 47 days. That is not a transient inconvenience. It is a persistent quality-of-life issue that directly affects medication adherence. For a deeper look at the mechanisms and practical solutions, see our guide on GLP-1 constipation: causes, solutions, and what actually works. A 2026 University of Pennsylvania study analyzing 410,198 Reddit posts confirmed the real-world picture: constipation ranked fourth among GLP-1 side effects, reported by 15.3% of users who discussed side effects at all. See what 410,000 Reddit posts reveal about GLP-1 side effects.

And adherence matters enormously. Up to 70% of GLP-1 users discontinue treatment within the first year. Side effects, gastrointestinal side effects in particular, are consistently cited as a primary driver. Every patient who stops treatment due to constipation represents a failure of the support ecosystem around these medications.

What can actually help?

Fiber supplementation with soluble prebiotic fiber addresses the core problem directly. It provides the fiber that reduced food intake removes, without the nausea-inducing bulk of whole foods. A powder that dissolves in water takes up minimal gastric volume.

Chicory inulin is particularly well-positioned for this role. It is the only prebiotic fiber with a proprietary EU health claim (EFSA Article 13.5) for bowel function.³ The claim is specific: chicory inulin contributes to maintenance of normal defecation by increasing stool frequency, when consumed at 12g per day. This claim was authorized based on BENEO’s Orafti chicory inulin - meaning only products using this specific ingredient at the correct dose can carry the claim.

The clinical dose of 12g per day is also the dose at which the prebiotic fermentation benefits are well-documented. Inulin is fermented by beneficial gut bacteria in the colon, producing short-chain fatty acids that support gut barrier integrity and feed the microbiome.

There is a nuance worth noting: chicory inulin is classified as high-FODMAP, which means some individuals may experience bloating, particularly at the full 12g dose when starting out. This is a feature of effective prebiotic fermentation, not a sign of intolerance, but it does mean that gradual dose ramping over 7-14 days is important for comfort. Start with 4g per day and increase by 2-4g every few days. For a detailed comparison of chicory inulin and psyllium husk, including FODMAP considerations, see our side-by-side fiber comparison for GLP-1 users.

If you want to close the gap through food first, see our guide to the best high-fiber foods by European regional diet.

If you are looking for specific product recommendations, we reviewed the best fibre supplements available in the UK by evidence, dosing, tolerance, and cost per effective dose.

The bottom line

The European fiber gap is not a minor nutritional footnote. It is a continent-wide deficit backed by decades of data, affecting metabolic health, gut function, and, for a rapidly growing population of GLP-1 medication users, quality of life and treatment adherence.

Closing that gap starts with awareness. Only 3% of Europeans know how much fiber they should be eating. The other 97% are not making an informed choice. They are making no choice at all.

We think that should change.

Related articles

• What Is Dietary Fiber? — a full guide to fiber types and what each does
• Soluble vs. Insoluble Fiber: Which Type Do You Actually Need? — matching the fiber to the problem
• Beyond Soluble and Insoluble: Particle Size and Chain Length — why two products with the same label behave differently
• Chicory Inulin: The Science — the full evidence base behind the EFSA health claim
• How to Start a Fiber Supplement Without Bloating — the 4-week ramping protocol
• Fiber and Muscle Loss on GLP-1 — what the evidence actually shows
• The Complete Guide to Fiber and GLP-1 Medications — the full picture in one place
• What Is Fibermaxxing? — the 2026 trend, assessed
• Best Fiber Supplements: US — reviewed by evidence and effective dose
• Best Fiber Supplements: Canada — reviewed by evidence and effective dose
• Best Fiber Supplements: Australia — reviewed by evidence and effective dose
• Best Fiber Supplements: Netherlands — reviewed by evidence and effective dose
• Best Fiber Supplements: Nordics — reviewed by evidence and effective dose