In hospitalized and chronically ill patients, malnutrition is associated with impaired immune function, increased infections, increased lengths of hospital stay, and a reduction in overall body function (Isabel and Correia 2003). Malnutrition is present in up to 40% of intensive care unit (ICU) patients and is associated with increased morbidity and mortality (Giner et al. 1996). With these facts, nutritional intervention often plays an important role in the overall therapy of at-risk patient populations.