"Bottom line. Some people will ♥ Culturelle. No studies have been very large, but several hold promise for travelers, people taking antibiotics, or kids with diarrhea:
A 1997 study of 245 adults who took LGG or placebo to prevent diarrhea when traveling to various countries showed that those who took LGG cut diarrhea risk almost in half.
A 1999 study of LGG’s ability to prevent or lessen antibiotic-associated diarrhea in children found that 26 percent who took placebo had diarrhea, compared with 8 percent who took LGG.
A 2000 study involving 287 youngsters from 10 countries found that LGG reduced infectious diarrhea by a day compared with placebo.
Research has also shown that LGG reaches the intestines and that 10 billion cells is an effective dose. A 2010 Consumer Reports survey is worth noting, too. Of respondents who reported using probiotics, 35 percent said that those they used “helped a lot.”"