Energy requirements of infants predicted from total energy expenditure and growth
We estimated energy requirements of infants from birth to 12
months of age from total energy expenditure and energy deposition as protein and
fat (Table 6, Figures 5 and 6). The energy costs of protein and fat synthesis
are covered in the estimate of total energy expenditure and therefore have been
excluded from this estimate of energy deposition. The relatively low energy
deposition at 0-1 months and high estimate at 1-2 months may be in error.
Because fat deposition probably does not increase so abruptly between 1 and 2
months, the average energy deposition for the interval 0-2 months was used in
calculating energy requirements. The 1985 FAO/WHO/UNU energy requirements are
9-39% higher than these estimates. These discrepancies are not trivial and could
lead to overfeeding of infants.
FIGURE 4 Energy cost of fat and
protein deposition in infants (kcal/d).(Boys)
Energy cost of
fat and protein deposition in infants (kcal/d).(Girls)
A comparison of FAO/WHO/UNU energy requirements and estimations
based on energy intakes recorded after 1980 and on TEE and growth is graphically
displayed in Figures 7 and 8.
FIGURE 5 Energy requirements of
infants estimated from total energy expediture and energy deposition