Probiotics are live bacteria, formulas of single or multiple species, provided to help establish a healthy gastrointestinal tract.  Probiotics are a hot topic these days, and a potent marketing tool. Despite their popularity, we often don't know if they really work to relieve intestinal problems.  And for those probiotics that do work, we almost never know their mechanism(s) of action.   

Olier and colleagues have taken us a step closer to understanding the mechanism of probiotic action.  They...

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