There is a difference in what you might bother you when flaring or what actually contributes to IBD or flaring. Nuts, seeds, fatty foods, raw veggies, lactose, spicy foods etc might bother you while flaring, but not neccesarily when not flaring.
Caffeine, Sugar and "bad fats" ie animal fats and deep fried foods etc have been diet items suggested to contribute to IBD. I think they contribute to many more health issues as well and should be eaten in moderation whether one has IBD or not.
Other than that, like everyone here says, it's very individual. Grains, wheat and gluten are foods that some people tolerate and some don't. A simple test can confirm if these bother you or not. If they don't, grains are part of a balanced diet, providing fibre etc.
Some people have suggested eating more fish and omega 3 supplements, which I do. "Good fats" are said to have anti-inflammatory effects.
It really does help also to keep a food diary. If you have a problem, check what you ate in the last couple days that it could be and mark it. If it happens again, try harder to avoid that food.
Don't be afraid to eat. If you miss good nutrients from not eating, you could do just as much harm as good. Just be watchful.
Good luck staying flare free
Chuck - 28 yrs and counting
Diagnosed w/ UC Dec 08 - currently feeling ok
Pentasa 500mg 2pills-4x daily
50mg 45mg 40mg 35mg day - Calicium + Vit D
Multivitamin, vitamin C, probiotics, fish oil
"If you can solve your problem, then what is the need of worrying? If you cannot solve it, then what is the use of worrying?"