Close to three-fourths of patients with chronic obstructive pulmonary
disease (COPD) suffer from weight loss. Identifying a single cause for
this is difficult, as several factors-including chronic mouth breathi
ng, dyspnea, aerophagia, certain medications, and depression-often act
in concert. Malnutrition can exacerbate symptoms of COPD by decreasin
g ventilatory muscle strength, exercise tolerance, and immunocompetenc
e, and by increasing the risk of depression and anxiety. Goals of nutr
ition intervention are to prevent or reverse malnutrition without wors
ening the disease process and to improve respiratory function, thereby
reducing morbidity and delaying mortality. Recomendations for intake
of fats, carbohydrates, protein, and water must be individualized.