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Lactobacillus acidophilus CL1285, Lactobacillus casei LBC80R and Lactobacillus rhamnosus CLR2 improve quality-of-life and IBS symptoms: a double-blind, randomised, placebo-controlled study

in Beneficial Microbes
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K. Preston Westlake Medical Research, 550 St. Charles St., Ste. 208, Thousand Oaks, CA 91360, USA.

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R. Krumian Westlake Medical Research, 550 St. Charles St., Ste. 208, Thousand Oaks, CA 91360, USA.

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J. Hattner Sprim Americas, 254 Front St. Ph, New York, NY 10038, USA.

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D. de Montigny Bio-K Plus International, Inc., 495 Blvd. Armand-Frappier, Laval, H7V 4B3, Canada.

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M. Stewart Sprim Americas, 254 Front St. Ph, New York, NY 10038, USA.

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S. Gaddam Digestive and Liver Disease Specialists, 11922 Seacrest Dr., Ste. A, Garden Grove, CA 92840, USA.

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A combination of Lactobacillus acidophilus CL1285, Lactobacillus casei LBC80R and Lactobacillus rhamnosus CLR2 was compared to placebo for relief of symptoms of irritable bowel syndrome (IBS). A total of 113 subjects at 3 clinical sites were randomised in a 2:1 ratio and followed for 12 weeks. Subjects ingested either 2 capsules of active study product, containing 50×109 cfu of live organisms, or 2 placebo capsules daily. Endpoints included improvement in abdominal pain, days of pain, distention, stool consistency and frequency, quality of life (QOL), and adequate relief (AR) of IBS symptoms. IBS subtypes constipation (IBS-C), diarrhoea (IBS-D), and mixed (IBS-M) were evaluated separately; the effect of gender was also examined. For all efficacy endpoints improvement of 30% or more vs placebo was considered clinically significant. With the exception of pain intensity and AR, the endpoints demonstrated a therapeutic advantage of active over placebo for IBS symptoms in at least some subject subgroups. The IBS-D and female subgroups showed the largest and most consistent effects. Stool frequency and consistency were evaluated in the IBS-C and IBS-D subgroups, and improvement of active vs placebo was noted in both. QOL improvement was seen overall and in specific domains. Adverse events (AEs) were limited to 7 subjects; all were of mild or moderate intensity except one, severe cramping. Four AEs in the same subject in the placebo group were judged to be related to study product; these resolved by the end of study. There were no serious AEs.

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