Lactobacillus Casei induces activation of the immune system in your gut. This species is also helpful in treating diarrhea caused by antibiotics and viruses. It inhibits growth of E. coli, as well as being effective against other types of infections. It is also taken for general digestion problems, irritable bowel syndrome (IBS), colic in babies, inflammatory bowel disease (IBD), inflammation of the colon, stomach pain, and constipation.