• Carla J Gargallo-Puyuelo, Erika Alfambra, Jose Antonio García-Erce, and Fernando Gomollon.
• Digestive Diseases Service, Hospital Clínico Universitario "Lozano Blesa", Zaragoza, 50009 Aragón, Spain. carlajerusalen@hotmail.com.
• Nutrients. 2018 Dec 11; 10 (12).

AbstractIron plays a key role in many physiological processes; cells need a very exact quantity of iron. In patients with inflammatory bowel disease, anaemia is a unique example of multifactorial origins, frequently being the result of a combination of iron deficiency and anaemia of chronic disease. The main cause of iron deficiency is the activity of the disease. Therefore, the first aim should be to reach complete clinical remission. The iron supplementation route should be determined according to symptoms, severity of anaemia and taking into account comorbidities and individual risks. Oral iron can only be used in patients with mild anaemia, whose disease is inactive and who have not been previously intolerant to oral iron. Intravenous iron should be the first line treatment in patients with moderate-severe anaemia, in patients with active disease, in patients with poor tolerance to oral iron and when erythropoietin agents or a fast response is needed. Erythropoietin is used in a few patients with anaemia to overcome functional iron deficiency, and blood transfusion is being restricted to refractory cases or acute life-threatening situations.

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