Benefit No. 1: Yogurt With Active Cultures May Help the GutWhile more study is needed, there's some evidence that yogurt with active cultures may help certain gastrointestinal conditions, including:Lactose intoleranceConstipationDiarrheaColon cancerInflammatory bowel diseaseH. pylori infectionThat's what researchers from the Jean Mayer U.S. Department of Agriculture Human Nutrition Research Center on Aging at Tufts University concluded in a review article. The benefits are thought to be due to:Changes in the microflora of the gutThe time food takes to go through the bowel.Enhancement of the body's immune system (more on this below).In another recent study, the type of diarrhea that some people get after taking antibiotics was found to be reduced when the study participants drank a drink containing three particular probiotics (L. casei, L. bulgaricus, and S. thermophilus).