Adult bowel-function studies use 5–10 g/day for 2–4 weeks, titrated upward
Reviewed · Published
Inulin
A fermentable fructan fiber serving as a substrate for gut microbes.
Established functions
- A fermentable fructan fiber serving as a substrate for gut microbes.
Dietary sources
- chicory
- Jerusalem artichoke
- onions
Claims and evidence
Claims that Inulin alone prevents or treats disease, or invariably improves health without deficiency, are unsupported.
Japanese reference amounts
- Japanese adults (age and sex as specified): As fiber, adult goal: men at least 20–22 g/day; women at least 18 g/day
Amounts studied
- Adult bowel-function studies use 5–10 g/day for 2–4 weeks, titrated upward
Tolerable upper limits
- No specific UL; gastrointestinal tolerance is the practical limit
Forms and bioavailability
Supplement forms: chicory inulin, agave inulin
- Chain length changes fermentation rate; FODMAP-sensitive people may develop symptoms.
Safety and interactions
Adverse effects
- gas
- bloating
- cramps
- diarrhea
Medicine and nutrient interactions
- monitor carbohydrate replacement with glucose-lowering therapy
Contraindications and cautions
- Avoid self-use during low-FODMAP IBS elimination or with bowel obstruction.
Practical selection
- Compare Inulin amount per serving, form, allergens, and batch testing; prefer a single-ingredient product suited to the intended use.
Sources and review
- Dietary fibre and health outcomes: systematic reviewsWorld Health Organization
Daiki Minaki (editorial and evidence review) ·
Frequently asked questions
How is Inulin different from its broader supplement category?
A fermentable fructan fiber serving as a substrate for gut microbes. Compare its named form and amount rather than assuming every category product supplies it.
View detailsWhat safety detail matters specifically for Inulin?
monitor carbohydrate replacement with glucose-lowering therapy Avoid self-use during low-FODMAP IBS elimination or with bowel obstruction.
View details