Irritable bowel syndrome (IBS) is a mysterious illness in which the large intestine fails to function normally. Its causes are not fully understood and treatments have often been ineffective. Now, Jonathan M. Berkowitz, M.D., uses cutting-edge research to provide a compelling and effective approach to treat this complex illness. Using the best of conventional and natural therapies, Dr. Berkowitz shows how an individualized program, one that treats all of the underlying causes,is the best way to heal IBS.