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Aliment Pharmacol Ther. 2010 Jan 15;31(2):218-27. doi: 10.1111/j.1365-2036.2009.04183.x. Epub 2009 Oct 26.

Clinical trial: the effects of a fermented milk containing three probiotic bacteria in patients with irritable bowel syndrome - a randomized, double-blind, controlled study.

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1
Department of Internal Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden. magnus.simren@medicine.gu.se

Abstract

BACKGROUND:

The effects of probiotic bacteria in IBS remain controversial.

AIM:

To study the effects of a probiotic product on IBS symptoms.

METHODS:

We randomized 74 IBS patients to receive 8 weeks of daily treatment with 400 mL milk fermented with the yoghurt bacteria and containing Lactobacillus paracasei, ssp. paracasei F19, Lactobacillus acidophilus La5 and Bifidobacterium lactis Bb12 (Cultura; active) or acidified milk without these bacteria (control). The primary endpoint was the proportion of subjects reporting adequate relief of their IBS symptoms at least 50% of the weeks. IBS symptom severity, psychological symptoms and quality of life were assessed.

RESULTS:

The proportion of responders was 38% (14/37 patients) in the active group and 27% (10/37 patients) in the control group (P = 0.3). IBS symptom severity improved significantly in both groups during the treatment period. This change was greater in the active group during the first 2 weeks, but thereafter, no significant group differences were seen.

CONCLUSIONS:

We could not detect a clearly positive effect of fermented milk containing three probiotic bacteria on GI symptoms in IBS patients compared with the control treatment. However, a trend towards a more favourable effect during the first weeks was seen in the active group.

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