Prebiotic Fiber · Inulin / FOS / GOS
Feeds beneficial gut bacteria; go slow to avoid gas.
Short answer
Prebiotic Fiber (Inulin / FOS / GOS) is a microbiome with evidence grade B, meaning it is supported by human RCTs. We track 3 produkter containing Prebiotic Fiber. Typical doses range from 20.0 to 4000.0 mg per portion. The top-ranked product scores 6.8 out of 10 on our composite scale (dose, evidence, price, testing, transparency). Prices range up to $69.00 per månad.
Top Prebiotic Fiber produkter
| Product | Varumärke | Dose | Pris/mo | 3rd-party tested | Poäng |
|---|---|---|---|---|---|
| NOVOS Vital | 4000.0 mg | $69.00 | Yes | 6.8 | |
| Nordic Flora Probiotic Daily | 20.0 mg | $30.95 | Yes | 4.8 | |
| Probiotic | 100.0 mg | $24.99 | No | 4.7 |
Scores are editorial judgments, not a scientific standard. Se how we score.
What it is
Fiber that resists digestion until your gut bacteria ferment it.
Why people take it
Trials show shifts in microbiota and short-chain fatty acid production. Digestive tolerance improves over weeks.
Our verdict
Start low (2 to 3 g/day) and ramp up. Sudden 10 g doses cause gas.
Structure & class
Inulin, fructooligosaccharides, galactooligosaccharides.
Mechanism & clinical data
Bindels 2015 review documented microbiota shifts.
Pharmacokinetics
Transit.
Dose & forms
What to watch out for
FODMAP sensitivity common. Titrate slowly.
Where this dose comes from
The trial dose above is our editorial pick from the published human trials for this ingredient. We choose the dose that the best-available studies used on the endpoint most relevant to longevity. The range shows the lowest and highest doses tested in published trials. The landmark studies below are the papers we read to set it. You can click through and check our work.
When new trials publish, our automated sweeps flag them. If a new study materially changes the dose, we update it through editorial review and record the old dose, new dose, and the triggering study in every affected product's recommendation history. The dose is never changed automatically.
Regelverk status
Timeline
Regelverk events, evidence grade changes, and key research milestones for Prebiotic Fiber, most recent first. Every entry links to its primär source.
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EU Court sharpens the bar for botanical health claimsA Court of Justice of the European Union ruling in april 2025 further tightened the requirements for how botanical ingredients (herbs, plant extracts) can be marketed with health claims in the EU, effectively removing much of the flexibility of the on-hold list.
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EU report identifies 117 supplement substances as potential health risksThe HoA Working Group on Food Supplements (26 European countries) published its first report evaluating 117 substances used in food supplements. Of these, 65 were assessed as likely novel foods, 6 were already regulated, 34 had insufficient data, and 12 were prioritized for Article 8 restriction under Regulation (EC) No 1925/2006. The 12 priority substances include ashwagandha, curcumin, melatonin, piperine, St. John's wort, coumarin, p-synephrine, maca, holy basil, Melaleuca, black cohosh, and L-tryptophan. The report drew on 1,500 RASFF alerts reviewed between 2017 and mid-2022.
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EU Health Claims Regulation adoptedRegulation (EC) No 1924/2006 laid down harmonised rules for nutrition and health claims made on foods, including supplements. Only claims listed in the EU Register of authorised claims can be used. Rejected botanical claims are held in a separate on-hold list.
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EU introduces the Novel Food RegulationRegulation (EC) No 258/97 required any food or food ingredient without a history of consumption in the EU before 15 maj 1997 to be authorised before being placed on the market. This is the framework that captures NMN, spermidine as a supplement ingredient, urolithin A, and many other longevity actives.
Landmark studies
Found in these produkter (3)
Alla produkter in our catalog that contain Prebiotic Fiber, ranked by our overall score. Ranking is editorial, never paid.
Buying guides and comparisons
Related ingredients
Se alla in Microbiome →Molekyler in the same class, plus the actives most often formulated alongside Prebiotic Fiber in our catalogue.
Frequently asked questions
What is Prebiotic Fiber?
Fiber that resists digestion until your gut bacteria ferment it.
What dose of Prebiotic Fiber should I take?
The trial dose in published human studies is 5000 mg per dag, with a range of 2000 to 15000 mg per dag. Always consult a qualified clinician before starting any supplement.
Is Prebiotic Fiber safe?
FODMAP sensitivity common. Titrate slowly.
What is the best Prebiotic Fiber supplement?
We track 3 produkter containing Prebiotic Fiber. The top-ranked product scores 6.8 out of 10 on our composite scale, which evaluates dose, evidence, price, third-party testing, and transparency. See the comparison table above. Scores are editorial judgments, not a scientific standard.
What is the evidence grade for Prebiotic Fiber?
Prebiotic Fiber has evidence grade B, meaning it is supported by human RCTs. Grade A means replicated human RCTs with hard endpoints. Grade B means human RCTs with biomarker outcomes. Grade C means mixed or small human trials. See our evidence grading methodology.
Data verification
Bevisning grades are reviewed when new human RCTs are published. Product counts update automatically as new produkter are added. Dose ranges reflect published trial data, not brand recommendations. Read how we verify.