Abstract: The invention is a method for determining the effectiveness of a diet program for administration to a patient having at least one diet-responsive condition. The method includes the steps of selecting a plurality of patients, each having at least one diet-responsive condition; identifying at least one quantifiable indicator of each of the diet-responsive conditions and measuring the at least one indicator for each of the patient during a four week baseline period; and monitoring each of the patients during the baseline period to determine a baseline quality of life. The plurality of patient are divided randomly between a first group and a second group. The diet program is administered to each of the patients in the first group during a ten week intervention period and each of the patient in the second group is maintained on a control diet with known beneficial effects on the at least one diet-responsive condition during the intervention period.