Ever since my husband was diagnosed with IBS, I have been trying to learn everything I can About Irritable Bowel Syndrome. He is on a high fiber diet, but he is still having problems with gas and diarrhea. I learned that there are some foods that cause more of this than others, such as  beans, broccoli, and nuts. Carbonation can also play a role, and I think that may be where the bulk of his problem lies. He drinks soda every day, and never drinks water. If I can get him to change this one habit, I think we will see a huge improvement in his symptoms.