KEY POINTS 
Fiber and peppermint oil are part of the recommendations of the American College of Gastroenterology for the treatment of irritable bowel syndrome (IBS).
Several phytobotanicals, including Chinese herbal medicine, have been shown to be effective.
Effects of probiotics in IBS are strain specific.
Cognitive behavioral therapy (CBT) is at least as effective as drugs acting on 5HT receptors.
Gut-directed hypnotherapy benefits IBS patients.
Yoga-based…