Research has shown that probiotic bacterial strains, such as Bifidobacteria and Lactobacilli, aid in the treatment of Irritable Bowel Syndrome and other gastrointestinal and bowel diseases by inhibiting the colonization and growth of bacteria that cause disease. In addition, the gut microbiome is believed to play an integral role in regulating healthy immune system functioning. Immune system functioning is maintained by homeostatic relationships with the microbiome, which in turn plays a role in the development of lymphoid tissues and the immune system (Hooper, Littman, & Macpherson, 2012). Imbalances in gut microflora have been associated with impaired immune responses.