Psyllium Husk (Isabgol) for Constipation Relief

Research suggests that psyllium husk is one of the better-supported dietary fiber supplements for constipation relief, with evidence drawn from multiple randomized controlled trials, systematic reviews, and meta-analyses that consistently point in a supportive direction. Studies indicate that psyllium works primarily by increasing stool water content and bulk, which appears to ease defecation, improve stool consistency, and in some trials increase complete spontaneous bowel movements in people with chronic or functional constipation. The evidence base extends across general adult populations, older adults, and individuals with diabetes, with at least one systematic review granting it a formal grade B recommendation for chronic constipation treatment. One notable limitation comes from a 2023 placebo-controlled trial, which found that while psyllium improved stool consistency, it did not significantly outperform placebo in increasing bowel movement frequency overall, and that individual differences in gut microbiota composition appeared to influence how well participants responded, suggesting the benefits may not be uniform across all people.