ENERGY

During the initial shelter period when physical activity is lessened, 1500 kcal would be a reasonable goal, although more plentiful energy levels should be established as soon as possible. The 1500 kcal probably would not be adequate for most adults and adolescents, and there would probably be weight loss. The longer the delay in increasing energy levels after the initial disaster, the weaker the population will become, and the greater the chance will be for adverse effects on the growth and development of children. The effects of restricted energy levels will be determined by how long and how severely the energy intake is limited. Infants, of course, will be affected by restricted food supplies faster than will older children, and pregnant women and nursing mothers will need extra energy. If the energy level of the diet is not adequate, the body will use protein for energy instead of for tissue building.