Bifidobactera is commonly found in the digestive tract of breast-fed infants. It tends to flourish and eventually crowd out other unwanted bacteria in the digestive tract. Bifidobacteria creates short-chain fatty acids that provide several important functions. They are anti-inflammatory which can help prevent inflammatory bowel movements. They also help to keep the intestinal tract acidic to help prevent harmful bacteria from growing. This is very helpful at preventing diarrhea.