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In adults with chronic constipation, fibre supplements helped 66% of people compared with 41% on placebo; psyllium worked best, at more than 10 g a day for at least four weeks.

In adults with chronic constipation, fibre supplements helped 66% of people compared with 41% on placebo; psyllium worked best, at more than 10 g a day for at least four weeks.

In people with chronic constipation, added fibre helped 66% of people compared with 41% on placebo, and worked best above 10 g a day for at least four weeks.

Adds roughly one extra bowel movement a week in people with constipation.
