This study is a comparison of eating disorder patient outcomes on similar nutrition regimens regardless of degree of malnutrition. Acuity of symptoms in chronically and acutely malnourished patients were analyzed to determine the influence the duration of malnutrition has on refeeding syndrome. Patient outcomes did not differ based on chronicity of malnutrition and are compatible with previous studies in terms of weight gain, medical stabilization, and rate of electrolyte imbalance.