## Macronutrients Energy Carbohydrate Fat Protein and Amino Acids

Energy The estimated energy requirement (EER) for infants was derived by summing predicted total energy expenditure (TEE) and energy deposition for growth. Because the energy needs for growth decelerate with advancing age, an equation for EER was established for three age intervals during the first year of life (Table 1). The TEE is calculated using an equation (Table 1) based on energy expenditure measured by doubly labeled water and adjusted for weight of the child. The EER is then the sum of TEE for an individual child plus the predicted energy deposition for age (Table 1). No adjustment for physical activity was included in the EER for infants. Examples of the EER for males and females using reference weights are shown in Table 1 for infants at five ages during the first year. At most ages beyond the first 2 months of life, the values for EER exceed the average energy provided (500kcal) by human milk assuming a volume of intake (0.780 l/day) from human milk.

Table 1 DRI estimated energy requirement (EER) for infantsa Equations

0-3 months (89 x weight of infant (kg) —100) +175

(kcal for energy deposition) 4-6 months (89 x weight of infant (kg) —100) + 56

(kcal for energy deposition) 7-12 months (89 x weight of infant (kg) —100) + 22

(kcal for energy deposition)

Calculated EER for age using reference weights for age

Table 1 DRI estimated energy requirement (EER) for infantsa Equations

0-3 months (89 x weight of infant (kg) —100) +175

(kcal for energy deposition) 4-6 months (89 x weight of infant (kg) —100) + 56

(kcal for energy deposition) 7-12 months (89 x weight of infant (kg) —100) + 22

(kcal for energy deposition)

Calculated EER for age using reference weights for age

 Age (months) Males (kcal/day) Females (kcal/day)

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