There is no diet that is ideal for all IBSers.Some IBSers do well on atkins because it limits some types of carbs that cause gas (starches for instance)For those who need a lot of fiber to control their IBS or have trouble with high-fat foods, atkins can make them much worse. Even in normal people this diet can be constipating, for instance. Complaining of foul smelling gas in normal people because of the high amounts of fat and protien is also very common.It depends on which, if any, dietary issues you have.K.