Year 2015 / Volume 107 / Number 1
Letter to the Editor
Results of a nation-wide survey on hypolactasia - How is this condition diagnosed and managed in our setting?

55-56

Federico Argüelles-Arias, José María Tenías, Francesc Casellas Jordá, Alfredo J. Lucendo y Fernando Carballo álvarez

Abstract
Dear Editor,
Lactase is a disaccharidase present in the apical brush border of enterocytes. The lactase activity loss rate (hypolactasia) varies according to ethnic origin, which determines that the prevalence of hypolactasia also varies from one geographic area to the next (1). In Europe, the area with the lowest prevalence of hypolac- tasia is found in the north-western continent, around the North Sea and in some zones to the south-west of the Baltic Sea (2). The highest prevalence is found in southern Europe.
No recent data are available regarding the prevalence of hypo- lactasia in Spain since most studies date back to the 1970s (3). In the study performed in Galicia (4) a prevalence of 32.5 % was identified among the pediatric population. In the opposite age- range end resides the study by Varela-Moreiras et al. (5), who detected a prevalence of 36 %.
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Federico Argüelles-Arias, José María Tenías, Francesc Casellas Jordá, Alfredo J. Lucendo y Fernando Carballo álvarez. Results of a nation-wide survey on hypolactasia - How is this condition diagnosed and managed in our setting?. 55-56


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