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Chicory inulin and stool frequency: what four weeks showed

A controlled crossover study found a modest frequency difference. It does not establish a universal time for every prebiotic to work.

Read the evidence ↓

Supplement Science Insights Editorial Team

Published September 23, 2026

The study and its comparison

Forty-four volunteers with constipation received a chicory-derived inulin preparation or maltodextrin placebo during four-week treatment periods separated by washout. The inulin regimen supplied 12 grams daily. [1]

Median stool frequency was four per week with inulin versus three with placebo. Stools softened, while the reported satisfaction comparison was a nonsignificant trend. [1]

What the finding establishes

A result assessed after four weeks does not identify the exact day benefits begin. It also does not apply automatically to every fiber, dose or cause of constipation. Two authors were affiliated with the BENEO Institute; complete funding and conflict details were not established from the retrieved abstract. [1]

A hypothetical distinction

Imagine investigators compare end-of-month averages. Those averages cannot promise that every user notices a change on the same day.

Interpretation checklist — Chicory inulin and stool frequency
DetailInterpretation
Measured outcomeKeep the endpoint specific
Study preparationNot every retail product
Remaining uncertaintyNot resolved by a mechanism
Chicory inulin and stool frequency: what four weeks showed — original article outline diagram
Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

Sources for this article

  1. Effect of consumption of chicory inulin on bowel function in healthy subjects with constipation: a randomized, double-blind, placebo-controlled trial.
    Source consulted: 2026-09-19. This is a reference resource, not a claim that we conducted the studies or tested a product.