Crohn's Disease Diet: What Helps, What Doesn't

No diet is proven to induce remission in adults with Crohn's disease on its own, but diet matters for symptoms, nutrition and possibly flare risk. The strongest controlled adult evidence compares two real-food approaches and finds them similar. This guide covers what was tested, how to eat in a flare versus remission, and which cautions apply to Crohn's specifically (strictures, malabsorption). For supplements, see Crohn's disease supplements. For the colitis equivalent, see the ulcerative colitis diet guide.

What the Trials Show

DINE-CD: Specific Carbohydrate Diet vs Mediterranean Diet

DINE-CD (Lewis et al., 2021, Gastroenterology) randomised 194 adults with mild to moderate Crohn's symptoms to the Specific Carbohydrate Diet (SCD) or a Mediterranean-style diet. At week 6, symptomatic remission was 46.5% with SCD and 43.5% with the Mediterranean diet (P = .77). SCD was not superior, and the two groups were also similar for the stool inflammation marker calprotectin and for CRP, though few participants had calprotectin data.

Grade: B for "both diets can relieve symptoms in some people with mild disease", C for any claim about healing the bowel lining.

Crohn's Disease Exclusion Diet (CDED)

The CDED removes foods linked to gut barrier and microbiome changes (such as processed foods and additives) while using partial enteral formula. In children with mild to moderate Crohn's, a 2019 randomised trial (Levine et al., Gastroenterology) found CDED plus partial enteral nutrition was better tolerated than exclusive enteral nutrition, with both inducing remission by week 6. In a small adult pilot (Yanai et al., Lancet Gastroenterol Hepatol), 68% (13 of 19) on CDED plus partial enteral nutrition and 57% (12 of 21) on CDED alone reached clinical remission at week 6, a difference that was not statistically significant. The authors called for a larger adult trial.

Grade: B in children, C in adults.

Exclusive Enteral Nutrition

Exclusive enteral nutrition (a formula-only diet for about 6 to 8 weeks) is a recognised first-line option for inducing remission in children with active Crohn's. It is much less used in adults, partly because people struggle to stay on it.

The Autoimmune Protocol

An uncontrolled pilot of the Autoimmune Protocol (Konijeti et al., 2017) in a small group of people with IBD reported clinical improvement in most participants. With no comparison group and so few participants, this is Grade C. See AIP vs other diets for how it compares.

Flare vs Remission

In a Flare

• Smaller, more frequent meals; plenty of fluid.
• Softer, cooked, lower-fibre foods are often better tolerated.
• Limit alcohol, fried and fatty food, and caffeine if they worsen symptoms.
• Call your care team rather than relying on diet: flares usually need treatment changes.

In Remission

• Aim for a varied, Mediterranean-style pattern with vegetables, fruit, legumes as tolerated, fish, olive oil and whole grains.
• Reintroduce fibre gradually unless you have a stricture.
• Limit ultra-processed foods and processed meat. The evidence is mostly observational (Grade C) but the advice is low-risk.

If You Have a Stricture

A narrowed section of bowel can block with fibrous, hard-to-digest foods (nuts, seeds, popcorn, raw vegetable skins, tough meat). Cooking, peeling and chopping help, and some people need a low-residue diet. Sudden severe pain, vomiting or bloating needs urgent medical attention.

Nutrition Risks Specific to Crohn's

Inflammation in the small intestine reduces absorption, and surgery can remove the part that absorbs B12 and bile acids. Common problems are iron deficiency, low B12, low vitamin D, low zinc, and unintended weight loss. Restrictive diets add to these risks. Ask for periodic blood tests, and see an IBD dietitian before any exclusion diet. Dose decisions for supplements are covered in Crohn's disease supplements.

Peptide and gut-lining approaches are discussed separately in BPC-157 for Crohn's disease. That is early-stage research and not a replacement for medication.

For a broader comparison of anti-inflammatory eating patterns, see the autoimmune diet comparison.

A Practical Plan

1. Keep taking your prescribed medication. Diet supports it.
2. Start with a Mediterranean-style base, which DINE-CD supports as a reasonable option.
3. Keep a food and symptom diary for 2 to 4 weeks.
4. Remove one suspected trigger at a time instead of cutting whole food groups.
5. Check iron, B12, vitamin D and weight regularly.
6. Involve an IBD dietitian for any structured exclusion diet.

Take the free 3-minute AutoimmuneFinder quiz to see your personalized, evidence-graded protocol.

Frequently Asked Questions

What is the best diet for Crohn's disease?

No single diet is proven best. In DINE-CD, symptomatic remission at week 6 was 46.5% with the Specific Carbohydrate Diet and 43.5% with a Mediterranean-style diet, which was not a significant difference. The Mediterranean-style diet is easier to follow and nutritionally complete.

Can diet put Crohn's disease into remission?

In children, exclusive enteral nutrition is an established first-line option. In adults, the Crohn's Disease Exclusion Diet shows promise in small studies. Diet should not replace prescribed treatment.

What foods should I avoid with Crohn's disease?

Triggers are individual. Common advice is to limit ultra-processed food, red and processed meat and alcohol, and, if you have a stricture, hard-to-digest high-fibre foods. A food diary helps identify your own triggers.

Is fibre bad for Crohn's disease?

Not generally. It is restricted mainly with strictures or severe flares. Many people in remission do well with gradually increased fibre.

This site provides educational information only. Not medical advice. Always consult your healthcare provider before changing your treatment plan.