How can I get more energy from my food? Any ten-year-old school girl will undertake to answer the question at once. And the answer is, according to what she is taught in school, to eat more “energy food.” That is, eat more fats and carbohydrates. However, it is not quite so simple as that. Grandmother Murphy, who has long since forgotten what she learned in school on the subject of foods-if anything-and who may even never have gone to school, knows perfectly well as a matter of common sense that if little Annie eats very much candy she will make her- self sick, that she will become pale-faced and nervous, that she will have endless trouble with her teeth and that she will be distinctively lacking in that spontaneous untiring energy that is the characteristic of normal and healthy childhood.