The first rule of the breakfast club is that you have to actually eat breakfast. Whether youre focused on losing weight or just arent that hungry in the morning, it. Eat Breakfast. Wellness. Taylor Wolfram, MS, RDN, LDN. Irritable bowel syndrome is a disorder that affects the large intestine. Though no specific cause is known, several factors may contribute to IBS, including heredity, lifestyle, allergies, an infection, an abnormally large number of bacteria growing in the intestine and hormones. Often, diet changes, stress management and a healthy, active lifestyle can keep IBS under control.