I tried this, and it did not work for me at all. It was a tough diet to stick to, as everything you buy has SOMETHING you aren't allowed to eat. But I had to cut out so many of my fiber sources, i.e. lentils, dried fruits, whole wheat, that it messed up my elimination big time, and I had the worst IBS symptoms ever! I think this diet is geared for people with IBS-D. And of course it reduces gas, as you have to cut out every possible gas producing food. Duh.