What kind of foods should you not eat if you have gastroenteritis?

Start slow: It's best to give your GI tract a rest in the beginning. Focus on hydration. When you do eat, start with clear liquids and then advance gradually if tolerated. Good things to eat included bananas, toast, rice, broth, and apples. Avoid caffeine, alcohol, milk products, acidic food, and fatty food. Stay off milk products until you've been better for 1-2 weeks.