Also, stay away from the natural occurring sugar - Sorbitol. It occurs in fruits like Apples, Pears, Peaches and Prunes. And, it also occurs in sugar-free candies and gum and starches, including potatoes, corn, rice, bread, noodles and any products made from flour. These produce more gas as they are broken down in the large intestine.
So, keep these points in mind and take care of the size of your waist.