Pediatric Nutrition in Practice

44 van Goudoever

Age Average
requirement
(EAR)a,
mg/kg
per day

Safe level

of intake

(RDA)b,

mg/kg

per day

7 – 12 months
Histidine 22 32
Isoleucine 30 43
Leucine 65 93
Lysine 62 89
Methionine + cysteine 30 43
Phenylalanine + tyrosine 58 84
Threonine 34 49
Tryptophan 9 13
Valine 39 58

1 – 3 years
Histidine 16 21
Isoleucine 22 28
Leucine 48 63
Lysine 45 58
Methionine + cysteine 22 28
Phenylalanine + tyrosine 41 54
Threonine 24 32
Tryptophan 6 8
Valine 28 37

4 – 8 years
Histidine 13 16
Isoleucine 18 22
Leucine 40 49
Lysine 37 46
Methionine + cysteine 18 22
Phenylalanine + tyrosine 33 41
Threonine 19 24
Tryptophan 5 6
Valine 23 28

9 – 13 years (boys)
Histidine 13 17
Isoleucine 18 22
Leucine 40 49
Lysine 37 46
Methionine + cysteine 18 22
Phenylalanine + tyrosine 33 41
Threonine 19 24
Tryptophan 5 6
Valine 23 28

Ta b l e 4. IAA requirements for older infants, children and adolescents

Age Average

requirement

(EAR)a,

mg/kg

per day

Safe level

of intake

(RDA)b,

mg/kg

per day

9 – 13 years (girls)

Histidine 12 15

Isoleucine 17 21

Leucine 38 47

Lysine 35 43

Methionine + cysteine 17 21

Phenylalanine + tyrosine 31 38

Threonine 18 22

Tryptophan 5 6

Valine 22 27

14 – 18 years (boys)

Histidine 12 15

Isoleucine 17 21

Leucine 38 47

Lysine 35 43

Methionine + cysteine 17 21

Phenylalanine + tyrosine 31 38

Threonine 18 22

Tryptophan 5 6

Valine 22 27

14 – 18 years (girls)

Histidine 12 14

Isoleucine 16 19

Leucine 35 44

Lysine 32 40

Methionine + cysteine 16 19

Phenylalanine + tyrosine 28 35

Threonine 17 21

Tryptophan 4 5

Valine 20 24

Data from Dietary Reference Intakes 2002/2005 [3]. a Cal-

culated from maintenance + growth (rate of protein de-

position × efficiency of protein utilization). b Calculated

from EAR + 2 × SD of EAR.

Koletzko B, et al. (eds): Pediatric Nutrition in Practice. World Rev Nutr Diet. Basel, Karger, 2015, vol 113, pp 41–45

DOI: 10.1159/000367868