>Jacque had a good idea - look at the list of "offenders"
>above, and eliminate one at a time until you can determine
>whether or not that is the culprit.
That's a good idea. YOu could do an elimination diet, like one does for food allergies. Usually, you eat a very bland diet for a few days, omitting any potentially 'guilty' foods, then add them back in one-by-one to find out what is the culprit.
Or just be more attentive to when you have gas and when you don't.
Other things that contribute to gas:
Swallowing too much air when eating (eating with the mouth open, gulping down drinks or using a straw).
Gas-producing elements in beans. If you cook your own beans from dried beans, it's best to soak them overnight, THROW OUT THE SOAK WATER (which will contain much of the gas-producing substances), and cook in fresh water.
Those who believe in the principles of food combining never eat fruit with anything else (fruit digests quickly, and when you mix it with other things that digest more slowly, those other things slow down the digestion of the fruit, which then ferments and causes gas. Fruit should be eaten alone, or with greens, or 20 minutes before other foods). They also say that combining starches and protein at theh same meal is a bad combo. Veggies and protein or veggies and starches are okay.
Do you eat any protein powders or bars? They could be part of the problem. I found that by pretty much eliminating isolated/concentrated soy protein from my diet, I greatly reduced the amount of gas I would have.