INTRODUCCIÓNLa población mundial enfrenta una epidemia de sobrepeso y obesidad y sus complicaciones metabólicas como la diabetes tipo 2 y las enfermedades cardiovasculares. Si bien anteriormente estas patologías afectaban principalmente las poblaciones de los países industrializados, la transición demográfica, epidemiológica y nutricional que ha ocurrido en las últimas décadas ha provocado su generalización a los países en desarrollo, donde frecuentemente coexisten con la malnutrición. Este fenómeno se debe principalmente al mejoramiento de la calidad vida (mejores sueldos, calefacción central, uso de automóviles, mayor disponibilidad de alimentos, entre otros), junto con la occidentalización de la dieta y la disminución de la actividad física (1).El año 2005, la Organización Mundial de la Salud (OMS) estimaba que el sobrepeso afectaba a 1.6 billones y la obesidad a 400 millones de adultos en el mundo. UTILIZACIÓN DE SUPLEMENTOS NUTRICIONALES ABSTRACTSimultaneously to the rapid increase of overweight and obesity a great number of products oriented to weight loss have emerged in the market. The aim of this study was to evaluate the scientific evidence supporting the use of three products designed for weight loss available in Chile: a lipidic emulsion that stimulates ileal brake, a protease inhibitor and an amylase inhibitor. The results indicate that the amylase and protease inhibitors efficiently inhibit the respective enzymatic activities in vitro; however, they do not affect weight control in clinical trials carried out in normal weight as well as in obese subjects. Thus, there is not enough evidence supporting the use of these products for weight control. On the other hand, the results concerning the lipidic emulsion are conflicting and more studies are needed to confirm its possible effect on weight control.
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