A simple search for “foods to avoid with diverticulitis” or “what not to eat for diverticulitis” will show you nuts and seeds, corn and popcorn.
You will also find recommendations to avoid seeds in fruits and vegetables like tomatoes, zucchini, cucumbers, strawberries and raspberries.
In fact, for years we’ve been taught these foods can literally get stuck in diverticula, causing irritation and eventually diverticulitis.
But this theory has never been proven, and research actually shows no link.
A large study in 47,228 men found no associations with nut, corn, or popcorn consumption and diverticulitis, after 18 years of follow-up (20, 21).
In saying that, anecdotal evidence (patient reports) consistently suggests that seeds are an issue, such as sesame seeds on a bread roll.
So evidence is really a mixed bag, it might be better to err on the side of caution and avoid seeds at least. I wish I could give a more concrete recommendation but there really is no consensus at this stage.
Summary: Nuts, seeds, corn, popcorn and fruits and vegetables with seeds may be safe to eat with diverticular disease, but the current scientific evidence clashes with patient reports. It might be a good idea to avoid seeds just in case.
https://www.dietvsdisease.org/diverticulitis-diet/?gclid=CjwKCAiA8bqOBhANEiwA-sIlN2ZqKSLHltSSzRm5DmY07oOLmzKnetRD75ZMcLiLusqy-q27yVy72RoCyTcQAvD_BwE
I Have a friend with this issue and her doctor said to avoid seeds,,she has and no flare up,,I think the difference is in what causes and what gives flare up or make it worse.