Despite aggressive efforts to increase awareness and treatment, the prevalence of obesity continues to grow in both industrialized and developing nations. In the United States, this problem has risen to epidemic levels. The most recent data from the Centers for Disease Control and Prevention indicate that almost two thirds of adults are overweight or obese (body mass index [BMI] > 25 kg/m2), a 50% increase over the last 4 decades.1 Although less common in younger adults and children, obesity in these populations is rising as well. Almost one of every six children and adolescents is overweight. Given its rising prevalence and association with many disease states, it is not surprising that the percentage of critically ill patients who are obese is also increasing.