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Functional intestinal disorders are common and affect nearly 20% of the population. These disorders occur more frequently in women than in men.
They often begin before the age of 30; they are manifested by a variable symptomatology that can alter the quality of daily life. Irritable bowel syndrome is its most classic expression and responds to a consensual definition based on clinical practice. Functional and nutritional biology sheds additional light on the clinic, which makes it possible to specify the underlying complex physiopathological mechanisms for a specific patient and directs towards better adapted and more effective care. It also makes it possible to discriminate a simple functional disorder from other diagnoses. differentials.