Last verified: 17 days ago
Psyllium Husk
Also known as: Plantago ovata husk, ispaghula husk, psyllium fiber, psyllium seed husk
Evidence under review. — Not yet rated
Soluble fiber that relieves constipation, eases IBS symptoms, and supports gut health.
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What it does
Psyllium husk is a soluble dietary fiber derived from the seeds of Plantago ovata. It works by absorbing water in the intestine, softening stool, and easing bowel movements — making it one of the...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
No established dose from provided studies
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Found in
ColonBroom, NOW Foods Psyllium Husk 700mg, zuPoo and 7 more
What the Science Says
Psyllium husk is a soluble dietary fiber derived from the seeds of Plantago ovata. It works by absorbing water in the intestine, softening stool, and easing bowel movements — making it one of the most studied natural remedies for constipation and irritable bowel syndrome (IBS). Clinical trials show it reduces IBS symptom severity in both children and adults, alters gut microbiota composition, and may help with laryngopharyngeal reflux when combined with standard treatment.
What It Doesn't Do
Won't help you lose weight — a meta-analysis of 27 RCTs found no meaningful reduction in BMI, waist circumference, or waist-to-hip ratio. Not a standalone treatment for serious digestive diseases. Won't detox your body or cleanse your colon in any medically meaningful way.
Evidence-Based Benefits
Relieves chronic constipation by softening stool and improving bowel movement frequency.
Moderate EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Significantly reduces IBS symptom severity in both children and adults compared to placebo.
Moderate EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Alters gut microbiota composition and increases metabolism-related bacterial activity.
Weak EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Boosts symptom resolution for laryngopharyngeal reflux when added to standard PPI therapy.
Weak EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Poor (as a fiber, psyllium is not absorbed — it works mechanically in the gut by trapping water and bulking stool, not through systemic absorption)
Red Flags to Watch For
- Must be taken with plenty of water — swallowing without adequate fluid can cause choking or esophageal blockage
- Can interfere with absorption of medications if taken at the same time; space doses apart from other drugs
- A meta-analysis found psyllium was associated with a statistically significant increase in body weight — not appropriate for weight loss goals
- May cause bloating, gas, or cramping, especially when first starting use
Products Containing Psyllium Husk
See how Psyllium Husk is used in these analyzed products:
ColonBroom
Supplement
NOW Foods Psyllium Husk 700mg
Supplement
zuPoo
Supplement
OLIPOP Blackberry Vanilla Prebiotic Soda
Metamucil
Supplement
Pinch Magic Fiber
Supplement
Gastro-Fiber®
Supplement
Nutrilite Fiber Powder
Supplement
Inno Cleanse™
Supplement
Kirkland Signature Product Line
Supplement
Frequently Asked Questions
What does Psyllium Husk do?
Soluble fiber that relieves constipation, eases IBS symptoms, and supports gut health.
What is the effective dose of Psyllium Husk?
No established dose from provided studies
Is Psyllium Husk safe?
Must be taken with plenty of water — swallowing without adequate fluid can cause choking or esophageal blockage
What doesn't Psyllium Husk do?
Won't help you lose weight — a meta-analysis of 27 RCTs found no meaningful reduction in BMI, waist circumference, or waist-to-hip ratio.
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25