Energy requirements in Chilean infants
G Salazara, F Vioa, C Garcíaa, E Aguirreb, W A Cowardc
a Institute of
Nutrition and Food Technology (INTA), University of Chile, Santiago,
Chile, b Chilean Commission for Nuclear Energy,
Amunategui 95, Santiago, Chile, c MRC Human Nutrition Research, Cambridge, UK
Correspondence to: Professor Salazar, Instituto de Nutricion, Universidad de Chile, Casilla 138-11, Santiago, Chile email: gsalazar{at}uec.inta.uchile.cl
Accepted 7 April
2000
AIM
To evaluate the
energy requirements of breast fed infants.
METHODSThe study was
conducted in 17 healthy exclusively breast fed infants of normal birth
weight (mean (SD) 3332 (280) g). Energy expenditure by the doubly
labelled water method and milk intake by the dose to infant method were
measured at 34 (4) days. A dose of 0.2 g/kg deuterium oxide (99.8%)
and 2.0 g/kg 10% 18O labelled water was given to the
infants, and urine samples were collected for seven consecutive days
after dosing.
RESULTSThe mean (SD)
weight of the infants during the period of evaluation was 4617 (343) g
and weight gain 34.0 (7.5) g/day. Daily milk intake was 728 (101) g and
its metabolisable energy content 2.71 kJ/g. The energy expenditure of
the infants was 1205 (312) kJ/day and energy required for growth was
607 (130) kJ/day. When combined this produced an energy requirement of
391 kJ/kg/day for these infants.
CONCLUSIONThese data
agree with those from other studies in the United Kingdom and the
United States and suggest that adequate growth can be achieved with
19.4% less energy than recommended by FAO/WHO/UNU.
Keywords: lactation; isotope dilution; breast milk intake; energy expenditure
© 2000 by Archives of Disease in Childhood
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