Bifidobacterium bifidum is one of the first beneficial bacteria that colonizes the infant digestive system after birth and may help prime the immune system to work properly. B. bifidum has good adhesion capabilities, meaning that it can persist in the digestive system despite difficult conditions like high acidity. Studies suggest that B. bifidum may benefit the digestive system through its impacts on mucin, the mucus lining of the intestinal tract. B. bifidum has also been studied for its potential to reduce the harmful effects of H. Pylori, an infection-causing bacteria, in the digestive system.