Rumbling stomach? A PLOS One review suggests that probiotics may ease eight types of gastrointestinal distress, including diarrhea and irritable bowel syndrome.

In fact, these beneficial bacteria could reduce the collective risk of those ailments by 42 percent, the researchers note, because of their capacity to overwhelm gut pathogens. A blend with multiple strains was especially potent, cutting the risk of GI trouble by 83 percent.

Choose yogurt with several strains of live, active cultures.