I have diverticulosis. I have several diverticuli in my sigmoid colon and one in my cecum [rare]. I have had two flares of cecal divertiulitis and one of sigmoid diverticulitis. One more bout of cecal diverticulitis and they said it might have to go.
Diverticulitis is very common in the western world because of our diets. You are correct that increasing fiber is a must. For those that have a difficult time eating enough foods high in fiber, fiber supplements can be useful. In the US, Benefiber and Fibersure are two products that are well tolerated and easy to use. In the powder form they can be added to any liquid, totally dissolve without grit, and have no taste. They can also be added to soups, gravies, casseroles, etc making it far easier to get ones daily finer needs.
Recent studies have indicated that avoidance of nuts and seeds is no longer needed when one has diverticulosis. I have no problem with seeds but do have a problem with popcorn husks and some nuts. All my diverticulitis attacks were after consuming popcorn or pistachio nuts. So I think this is likely something one should test and see how they tolerate it. Of course, your husband should follow what ever diet specifics his doctor outlined.
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