Data were collected from school boys, young women, young men and elderly men relative to the effect of the breakfast regimen on control of body weight. The data showed that omission of breakfast was ineffective in weight-reducing regimens, and that the most effective way to control weight was to gear the daily food intake to each individual so that he eats more, less, or the same amount of food necessary for daily energy requirements. It was also found that the nutritional principles involved applied to all ages and both sexes alike.