Irritable Bowel Syndrome Regional Cohort

Inclusion Criteria: * Patient * Normal laboratory work-up as part of routine care (CBC, CRP) * Over 18 years of age * Patient affiliated to a social security scheme * Person who has read and understood the information letter and does not object to taking part in the study Exclusion Criteria: * Patient suffering from an organic digestive pathology (chronic inflammatory bowel disease, microscopic colitis when endoscopy has been performed because deemed necessary, digestive cancer, coeliac disease) or major digestive surgery (excluding appendectomy and cholecystectomy). * Patient refusal * Patient does not speak or understand French * A pregnant woman or a woman in labour or breastfeeding * Person deprived of liberty by an administrative or judicial decision or person placed under court protection / sub- guardianship or curatorship