What are the recommended dietary modifications for patients diagnosed with diverticulosis?

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 16 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

For patients diagnosed with diverticulosis, the recommended dietary modifications focus on a healthy, balanced approach:

  • General Diet: Advise patients to eat a healthy, balanced diet that includes whole grains, fruit, and vegetables ,. There is no need for them to avoid seeds, nuts, popcorn, or fruit skins ,.
  • Fibre Intake: If a patient has constipation and a low-fibre diet, increasing their fibre intake gradually may help minimise flatulence and bloating ,. Adults should aim to consume 30 grams of fibre per day . Patients should be advised that the beneficial effects of increasing dietary fibre may take several weeks to achieve, and if tolerated, a high-fibre diet should be maintained for life ,.
  • Fluid Intake: It is important to drink adequate fluid, especially when increasing fibre intake, to reduce the risk of dehydration ,.

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