I have extensive diverticula. I had diverticulitis once, treated in hospital with I've antibiotics. For me, I'm at risk if I get constipated. I've learned that bananas, rice --especially white--, applesauce & wheat bread (BRAT, like what helps after flu-related diarrhea) are the main culprits. I avoid them all other than very small, occasional amounts. When I can't resist, I make sure to add powdered fiber to my daily, morning oatmeal. Daily breakfast: I add a tablespoon or two of old-fashioned oats to a mug of almond milk to which I also add a tbsp. plain cocoa. I eat plenty of fruits & veggies nearly every day. Hope thus helps others!