Adult constipation and LDL studies use 3–5 g twice daily for 8–12 weeks with ample water
Reviewed · Published
Psyllium
A viscous fiber that absorbs water and forms a gel.
Established functions
- A viscous fiber that absorbs water and forms a gel.
Dietary sources
- psyllium husk
Claims and evidence
Claims that Psyllium 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 constipation and LDL studies use 3–5 g twice daily for 8–12 weeks with ample water
Tolerable upper limits
- No specific UL; inadequate fluid creates obstruction risk
Forms and bioavailability
Supplement forms: whole husk, husk powder
- Viscosity is central; mix and drink promptly with plenty of water.
Safety and interactions
Adverse effects
- bloating
- cramps
- choking or esophageal blockage
- allergy
Medicine and nutrient interactions
- may delay medicines; separate by at least two hours
Contraindications and cautions
- Contraindicated with swallowing difficulty or bowel narrowing/obstruction.
Practical selection
- Compare Psyllium 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 Psyllium different from its broader supplement category?
A viscous fiber that absorbs water and forms a gel. Compare its named form and amount rather than assuming every category product supplies it.
View detailsWhat safety detail matters specifically for Psyllium?
may delay medicines; separate by at least two hours Contraindicated with swallowing difficulty or bowel narrowing/obstruction.
View details