The purposes for which food is taken into the body are two: the rebuilding of the bodily tissues, which are constantly consumed by physical and mental activities, and the production of heat and energy. During the period of growth, the body necessarily demands a large amount of tissue-building material, and it is natural and reasonable that a growing child should have a large appetite, and be ready to eat at all times of day. If, however, a person who has come to maturity continues to eat as heartily as in early life, more food is taken into the body than is required after the growing period is ended, a heavy strain is put upon the organs which remove waste products from the system, and there is likely to be a deposition of fat in the tissues. Another factor in producing these results is the fact that the adult usually leads a far less active life, physically, than the growing child, so that less food is needed for transformation into energy, as well as for the purpose of body-building. This is even more true now than it was a few generations ago; the higher standard of luxury in the modern manner of life, labor-saving devices of every kind, and improved transportation facilities, which have almost reduced out-door exercise to a matter of country-club athletics, are among the reasons for the present-day lack of physical activity among both men and women. It must not be forgotten, however, that our high-pressure modern life also favors the existence of a class, who, instead of feeding their vital fires too generously, are inadequately nourished; among the contributing factors in this case are improper food, hasty and unattractively served meals, unhygienic ways of living, and the heavy, nervous strain that makes havoc of so many lives, in one way or another. Considering first the case of the woman who is above the normal standard of weight, it may be said in the beginning that there are few stout people who cannot safely, and without resorting to any dubious measures, reduce their weight sufficiently to improve not only their appearance, but their comfort and general vigor as well. Such results are not produced in a moment, however, and patience, perseverence and a considerable exercise of will-power may be necessary.