Probiotics and prebiotics can play a significant role in the treatment of Crohn’s disease and ulcerative colitis, which together are called inflammatory bowel disease, or IBD. Many doctors believe probiotics can be especially valuable in the treatment of pouchitis, which is a common complication of surgery for ulcerative colitis. Yogurt contains probiotics. So do special formulations, including: LC1 (Lactobacillus johnsonii), Mutaflor (E. coli, Nissle 1917 strain), Saccharomyces boulardii (yeast), and VSL#3.