I have (had) diverticulitis, not fun at all. I did the whole diet without seeds, nuts, corn, including popcorn, did well for about 5 years on that. Then I got one infection after another for about 4 months. I had the bowel resection, not a fun surgery at all. After talking to my GI and GP doctors, they are finding out that it is not so much what you eat as to the bacteria that is in your intestines. I am fine now after the surgery.