avoid hard-to-digest foods such as nuts, corn, popcorn, and seeds
Foods with little or no fiber should be avoided. Eat high fiber foods like whole-grain cereals and breads, fruits (apples, berries, peaches, pears), vegetables (squash, broccoli, cabbage, and spinach), and dried beans, peas, and lentils.
You should try to avoid sweet foods such as chocolate
Any foods that have a high sugar level content or junk foods are the foods that you should avoid. Have fresh fruit and vegetables every day to keep you , or concentrated in class, work etc.
You should avoid high calorie foods because they will make you gain weight. You should avoid acidic foods because they will give you indigestion.
fatty foods
Fat foods
Avoid eating salty foods, Foods that have lots of grease, and foods that are thick.
I am not sure which foods you should aviod with colitis. I have never known anyone who actually has colitis. You should contact your local doctor to avoid with colitis
Fattening foods, sweets, and chips or junk foods...
Betroot
starches
You should be tested by an allergist so you are aware of the specific foods you are allergic to. Those are the foods you should always avoid.