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IBDNutrition

CDED Diet

Phase 3: Maintenance

From week 13: 25% PEN and individualised dietary expansion within the maintenance schedule described. Follow-up by the care team is required.

⚕ Clinical notice: This information is guidance only and is based on the cited scientific publications. It does not replace individualised dietary prescriptions from the clinical team.

Clinical safety and follow-up

These situations are not a list of absolute CDED contraindications. They require different actions and individual assessment.

Red flags: urgent assessment

  • Severe abdominal pain, heavy or non-stop bleeding, or vomiting blood: seek emergency care.
  • Persistent vomiting with distension and absent bowel transit, or marked deterioration in general condition: urgent assessment; do not try to manage this by changing the menu.

Do not wait to finish a diet phase or reach a fixed time point if the patient deteriorates.

Before starting or adapting the diet

  • Symptomatic stricture or suspected obstruction: medical assessment before prescribing foods or textures. The CDED phase does not determine a safe texture.
  • Malnutrition or very low intake: assess nutritional status and refeeding risk. In children, assess growth and anthropometry by age and sex, not a fixed adult BMI threshold.
  • Malnutrition alone does not indicate parenteral nutrition. It is reserved for situations where oral/enteral intake cannot meet needs or cannot be used, and for specific complications.
  • Pregnancy, breastfeeding or recent surgery: individual planning and nutritional follow-up. These do not automatically contraindicate all nutritional interventions.
  • Food allergy: check ingredients and product information. With cow milk protein allergy, do not use a formula containing intact milk protein; the clinical team must select an alternative, without automatic substitution.

Contact the team for reassessment

  • Ongoing weight loss, inadequate intake, poor tolerance or lack of response: bring review forward according to progress, without waiting three weeks if there is deterioration.
  • Rising CRP or faecal calprotectin: interpret alongside symptoms, examination and progress. An isolated marker does not by itself determine severity or the need for emergency care.

CDED requires gastroenterology and nutrition supervision. This reminder does not replace clinical assessment or an emergency care protocol.

Weekdays (Mon–Fri)

Phase 2 diet + the following additions

Base: All Phase 2 foods remain in effect. PEN is maintained at 25% of caloric requirements.

  • Plain whole-milk yoghurt

    No additives, colourings, or sweeteners.

    1 serving/day
  • Artisan bread or cooked pasta

    Prefer artisan bread without additives. Alternatively, use 200 g of cooked pasta; this is not the dry weight. Choose one option, not both.

    2 slices or 200 g/day
  • Black coffee or tea

    Not instant or capsule coffee.

    1 cup/day
  • Greater variety of fruits and vegetables

    Keep excluding persimmon, pomegranate, prickly pear, passion fruit, raw celery, leeks and large amounts of kale. With strictures, individualise foods and textures.

    In moderation

Flexible meals (Saturday and Sunday)

One breakfast and one lunch or dinner per day on those two days (4 in total). Prioritise home cooking. This calendar belongs to the maintenance schedule described; it is not a universal rule.

Free breakfast

In the morning

Free lunch or dinner

Midday or evening

May include

  • Wheat (bread, pasta, home-made pastries — not ultra-processed)
  • Dairy (milk, cheese, yoghurt)
  • Other meats (beef, pork, lamb — home-cooked)
  • Greater variety of cereals, fruits, and vegetables

Follow the weekday diet for the remaining meals. Fruit and vegetable exclusions also apply at weekends. Food restrictions are not a reason to stop the prescribed formula.

Restaurant Rule

Maximum 1 restaurant meal per week

  • 1

    Max. 1 restaurant meal per week

    Traditional cuisine only. Avoid highly processed menus or all-you-can-eat buffets.

  • 2

    Compensation rule

    One restaurant meal is equivalent to forgoing one full day of free weekend meals. That Saturday or Sunday follows the strict weekday diet.

  • Fast food — always forbidden

    No exceptions. Does not count as a restaurant meal or a free weekend meal.

Always Avoid

No exceptions — even during free meals

  • Fast food in any form
  • Ready-made meals and commercially frozen dough
  • Processed meats and cold cuts (bacon, sausages, industrial deli meats)
  • Sugary drinks (soft drinks, industrial juices)
  • Excess alcohol

References

[1]Induction and follow-up evidence through week 12, not validation of this Phase 3 schedule: Levine A, et al. Crohn's Disease Exclusion Diet Plus Partial Enteral Nutrition Induces Sustained Remission in a Randomized Controlled Trial. Gastroenterology. 2019;157(2):440-450.e8. PMID: 31170412