Dietary Microparticles in the Aetiology and Treatment of Crohn's Disease

INTERVENTION: Not provided at time of registration CONDITION: Digestive system diseases: Inflammatory bowel disease ; Digestive System ; Crohn's Disease PRIMARY OUTCOME: 1. Changes in Crohn's disease activity using the Harvey Bradshaw index (HBI) and the CDAI at four weekly appointments with the clinician and research nurse; 2. Changes in use of medication will also be investigated. SECONDARY OUTCOME: Not provided at time of registration INCLUSION CRITERIA: Crohn's disease patients, cohabiting fit family members, non‐Crohn's disease patients and age/sex matched controls (n=50/group) will be interviewed from the gastrointestinal clinics and staff at St Thomas' hospital.