Supplement evidence

078 / 575Fiber & digestive

Inulin

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The short answer

A fermentable prebiotic fiber that can increase stool frequency and alter gut microbes.

Evidence and scope: Conditional or population-specific
This status does not grade the ingredient for every goal, outcome, or person.
Important limitation: Benefit depends on the population, formulation, baseline status, and objective; results should not be generalized.
Before deciding: Key concern: Can worsen gas, bloating, or IBS/FODMAP symptoms.

01 / PRACTICAL GUIDE

Dose, absorption, and combinations

These are indication-specific reference or studied ranges—not a personalized prescription. Start with the objective, then check the form, label, medicines, and health conditions.

Reference range by objective

ConstipationStart 2–3 g/day; many studies use 5–10 g/day

Reference or studied range—not a personalized prescription. The product label or a clinician may specify a different dose.

Dose source ↗

More is not automatically better. A clinician or product label may specify a different amount.

Absorption / solubilityFat/water classification is not the key factor

Fat/water solubility is not the useful decision point; preparation, fluid, timing, or strain identity matters more.

How it is commonly taken

Increase gradually and divide with meals.

Do not combine casually

Can worsen gas, bloating, or IBS/FODMAP symptoms.

Dose and use source ↗

Dose and use links lead to primary or official source material. Search links are discovery tools, not proof that every returned paper applies.

02 / EVIDENCE

What the research says

We keep supportive, mixed, negative, safety, and contextual findings together. The headline never replaces the underlying papers.

2research papers in this ledger

6unique primary studies represented

291unique participants represented

These are audited counts for this JIVANA collection, not search-result totals. Participants are counted once when multiple papers use the same cohort; review papers are not added again to participant totals.

Open the research timelineResearch timeline

Entries are ordered by publication year. A study period appears only when the source reports it.

2025

Mixed or qualifiedPMID 41233756 · NCT05447481

Inulin-induced improvements on bowel habit and gut microbiota in adults with functional constipation

Bowel frequency, abdominal symptoms, and parts of constipation-related quality of life improved, with microbiome changes. A carryover effect biased the crossover comparison; a first-period analysis supported benefit but reduced effective sample size and certainty.

Published: 2025Duration: Two 4-week crossover periodsn=39 participants

Study design and methods

Design: Randomized, double-blind, placebo-controlled crossover trial
Population: 39 adults with Rome III functional constipation
Intervention: Chicory inulin 12 g/day versus placebo
Outcome: Stool frequency and consistency, symptoms, quality of life, and gut microbiota

Funding or conflict note: Two authors were current employees and one was a former employee of the inulin producer Sensus B.V.; registration was retrospective.

Open research record ↗

2014

Supports a specific usePMID 25208775

Effectiveness of inulin intake on indicators of chronic constipation

Pooled results favored inulin for stool frequency, consistency, transit time, and hardness, but pain and bloating did not improve. The small evidence base and varying measures limit precision.

Published: 2014n=252 participants5 primary studies represented

Study design and methods

Design: Meta-analysis of 5 randomized controlled trials
Population: 252 participants with chronic constipation
Intervention: Inulin versus control across trials published from 1995–2013
Outcome: Stool frequency, consistency, transit time, hardness, pain, and bloating

Open research record ↗

Unscreened discovery appendix—not evidence7 candidate publicationsSearch run: Aug 21, 2026

Complete for the displayed PubMed query at the search timestamp—not for all databases or every possible synonym. Candidates can be irrelevant, duplicate the same study, or report negative findings. They are never summed as evidence or participants until screened.

03 / SOURCES

Start with the source material

Official evidence overviewPubMed bounded human-evidence search Live PubMed discovery searchNational Library of Medicine

The live search is for discovery only. Search-result counts change and are not included in the audited totals above.

Recent PubMed discovery recordsDirect links to the first 12 records returned by the reproducible search. These are discovery candidates—not reviewed summaries or a count of supportive findings.

04 / EXPERT CONTEXT

Expert context—not evidence

Expert positions are dated context—not scientific evidence. They never raise the evidence status or become consensus by repetition.

No direct, source-verified endorsement is currently recorded. Research authorship or discussion alone is not treated as endorsement.