A cross-sectional questionnaire-based study performed in patients with IBD has found that many had tried a gluten-free diet. Even though only a small number of the patients reported a diagnosis of coeliac disease (0.6%) or noncoeliac gluten sensitivity (4.9%), 65.6% of those who had tried a gluten-free diet experienced improvement of gastrointestinal symptoms and 38.3% reported a positive effect on the number or severity of IBD flares.