I have gastritis. what foods should i avoid?

Diet: First, stop irritants such as alcohol, tobacco, caffeine, meds like advil (ibuprofen) or aspirin, carbonated beverages, fruit juices. Then eat a fiber-rich diet. Foods containing flavonoids, like apples, celery, cranberries (including cranberry juice), onions, garlic, and tea may stop the growth of h. Pylori, the bacteria that may be causing it. Avoid high fat foods.