Bifidobacterium bifidum is a strain of lactic acid-producing bacteria normally found in the human intestine, more so in breast-fed infants than in adults. Bifidobacterium bifidum is considered a probiotic, beneficial bacteria that help maintain the health of the intestinal tract and aid in digestion. Probiotics also assist in nutrient absorption and help control the amount of harmful bacteria in the gut. Probiotics come from food sources, such as yogurt, but they can also be consumed as dietary supplements. Orally, Bifidobacterium bifidum seems to be well-tolerated by most people. No adverse effects from Bifidobacteria ingestion have been reported 1.