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ingestible · for gut health & ibs

Psyllium Husk

Reviewed by the Nimbera editorial team · Last updated May 2026

Bijkerk CJ et al. 2009 BMJ (PMID 19713235) - RCT of 275 IBS patients found psyllium supplementation (10 g/day) reduced symptom severity score by 90 points vs 49 points for placebo (p = 0.03) after 3 months; effect was especially pronounced in constipation-predominant IBS.$5-15/month

How to use

Start with 5 g (1 teaspoon) of psyllium husk powder daily mixed in 8 oz of water or juice, taken 30 minutes before a meal. Gradually increase to 10-15 g/day over 2-3 weeks. Drink an additional 16 oz of water throughout the day. Metamucil, Konsyl, and generic psyllium are equivalent. Capsule forms are available for convenience.

How it works

Psyllium is a soluble fiber that forms a viscous gel in the gut, regulating stool consistency in both directions - adding bulk and moisture to hard stools (constipation) and slowing transit of loose stools (diarrhea). It feeds beneficial gut bacteria as a prebiotic and promotes butyrate production, which reduces visceral sensitivity and supports intestinal barrier integrity.

Where to buy

Metamucil ($15-25 for 114 servings), Konsyl Original ($20-30), NOW Foods Psyllium Husk Powder ($10-20 for 24 oz). Generic store brands at Costco and Walmart are equally effective. Available at all pharmacies and grocery stores.

Typical cost: $5-15/month

Safety notes

Must be taken with adequate water - psyllium without sufficient liquid can cause esophageal or intestinal obstruction, especially in people with swallowing difficulties. Start at a low dose and increase slowly to avoid bloating and gas during the first 2 weeks. Not appropriate during acute bowel obstruction. May slow absorption of medications - take psyllium 2 hours before or after any oral medications.

Drug & supplement interactions

  • Always tell your doctor or pharmacist about any supplements you take.
  • Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
  • Herbal remedies can affect how the body absorbs or metabolises drugs.
  • Check drugs.com interactions checker before starting.

Clinical source

Bijkerk CJ 2009 - BMJ (PMID 19713235)

This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.