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Published on: 4/7/2025

What Dietary Considerations Should Be Made for Diverticulitis, Including a High Fiber Diet for Diverticulosis?

Diverticulitis and diverticulosis are conditions related to the formation of diverticula (small pouches) in the colon. While diverticulosis is often asymptomatic, diverticulitis can cause significant discomfort and requires dietary management.

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Explanation

High Fiber Diet for Diverticulosis

  • Purpose of Fiber: A high-fiber diet is essential for managing diverticulosis as it helps to soften stool, promote regular bowel movements, and reduce pressure in the colon, which may prevent the formation of new diverticula.
  • Recommended Fiber Intake: Aim for 25-30 grams of fiber per day. This can be achieved through a combination of soluble and insoluble fiber sources.
  • Sources of Fiber:
  • Gradual Increase: Increase fiber intake gradually to prevent gas and bloating, and ensure adequate hydration to help fiber work effectively.

Dietary Modifications During Diverticulitis

  • Low-Fiber Diet During Flare-Ups: During an acute episode of diverticulitis, a low-fiber diet may be recommended to reduce bowel irritation. This typically includes:
  • Reintroduction of Fiber: Once symptoms improve, gradually reintroduce fiber into the diet, starting with soluble fiber sources, which are gentler on the digestive system.

Hydration

  • Importance of Fluids: Staying well-hydrated is crucial, especially when increasing fiber intake. Aim for at least 8-10 cups of fluids per day, primarily from water, to help prevent constipation.

Avoiding Certain Foods

  • Controversial Foods: While previous guidelines suggested avoiding nuts, seeds, and popcorn due to concerns they might irritate diverticula, recent studies indicate that these foods are generally safe for most individuals with diverticulosis. However, if specific foods trigger symptoms, it may be wise to limit them.
  • Processed Foods: Limit intake of highly processed foods, which are often low in fiber and can contribute to digestive issues.

Monitoring Symptoms

  • Personalized Approach: Each individual may react differently to certain foods. Keeping a food diary can help identify any specific triggers that exacerbate symptoms.

(References)

  • Tursi A, Elisei W. Diet in colonic diverticulosis: is it useful? Pol Arch Intern Med. 2020 Mar 27;130(3):232-239. doi: 10.20452/pamw.15199. Epub 2020 Feb 20. PMID: 32077444.

  • Carabotti M, Falangone F, Cuomo R, Annibale B. Role of Dietary Habits in the Prevention of Diverticular Disease Complications: A Systematic Review. Nutrients. 2021 Apr 14;13(4):1288. doi: 10.3390/nu13041288. PMID: 33919755; PMCID: PMC8070710.

  • Polese B, Carabotti M, Rurgo S, Ritieni C, Sarnelli G, Barbara G, Pace F, Cuomo R, Annibale B; Remad Group. Patients with Diverticular Disease Have Different Dietary Habits Compared to Control Subjects: Results from an Observational Italian Study. Nutrients. 2023 Apr 28;15(9):2119. doi: 10.3390/nu15092119. PMID: 37432301; PMCID: PMC10180998.

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