The truth is everyone is different. I suggest keeping a food diary. I used to suffer from such bad gas. Now when I get it it's usually because I fell off the wagon. Granted my new diet is VERY limited, but it has helped a lot! Firstly, I eliminated whole wheat products. Then I realized fructose is a big problem, so I am careful when I eat that. Especially important, I cannot eat sulphur-containing foods like eggs, garlic, or onions, or I am sure to suffer from tons of really smelly gas! I usually look to the day before to find an offending food, since it usually takes quite some time for food to make it to the large intestine where things are fermented. Giid luck with it all!