How does psyllium impact IBS?

• A. Increases involuntary stool leakage
• B. Reduces incidence of involuntary stool leakage
• C. Worsens constipation
• D. No effect on IBS

Answer: (B)

Psyllium is a soluble, viscous fiber that forms a gel in the gut. This gel increases stool bulk and water content, helping to normalize stool form and slow rapid transit. In IBS, this means stool consistency becomes more stable and urgency decreases. For IBS with diarrhea, forming a bulkier, softer stool reduces episodes of leakage by making stools less liquid and easier to control. It’s generally well tolerated because the effect is gentle and helps both ends of the IBS spectrum by regularizing patterns without irritating the gut. Start with small amounts and plenty of fluids, then increase gradually to minimize gas or bloating.