Usually with IBS it is more the act of eating than which foods you eat. Although I would recommend cooking veggies and sticking to lower fructose, low sorbitol fruits (so no apples, pears, peaches, cherries, plums or similar fruits unless you cook them).You can lose weight on whatever your safe foods are, you do not need to change the food, but you may need to be strict about portion control. Smaller more frequent meals are usually better for both IBS and blood sugar control than waiting as long as possible to eat.You can use any of a number of online diet trackers and put in the safe foods you can eat and work out what portion sizes will make it equal to the number of calories a day you need to eat. I mean you could check out the rice diet and while it does have fruits and veggies is very low calorie and mostly rice and other starches some IBSers find good for them. Now other IBSers do better on a low carb approach but you have to play with it to see what works for you.Have you seen the Calcium thread? Sometimes that type of dietary supplement can help calm it down. If you can't control it with over the counter medications you may need to get back to the doctor to see if you need a prescription.