Curbside Consultation in IBS: 49 Clinical Questions

Brian E. Lacy, PhD, MD

Question 41: What are Probiotics and Do They Work in IBS? (continued)

Yehuda Ringel, MD

Probiotics are live microorganisms that, when administered in adequate amount, confer a health benefit to the host.1 Commonly used probiotic bacteria include strains of lactic acid bacilli (Lactobacillus, Bifidobacterium, Lactococcus), other nonpathogenic strains of bacteria (E. coli Nissle 1917, Clostridium butyricum, Streptococcus thermophilus, Streptococcus salivarius, Bacillus coagulans, and Enterococcus faecium), and nonpathogenic strains of yeast (Saccharomyces boulardii and Saccharomyces cerevisiae). Probiotics may be found in certain food products, such as yogurts and fermented milk…