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The Boston Globe

Science

Probiotics fail to foil diarrhea, study finds

PARIS — A daily dose of probiotics failed to ward off diarrhea caused by antibiotics in a study of thousands of elderly patients that may deal a blow to the industry.

The study of 2,941 patients found little difference between the group of hospitalized people who, in addition to a course of antibiotics, were given strains of gut microbes known as bifidobacteria and lactobacilli, and those who unknowingly took a placebo for the same 21-day period.

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