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Stage of Lactation

Milk Concentration (mg/L)

Estimated Zinc Intake of Infants (mg/d)a

6–12 wk

1.7

1.33

2 mo–2 y

1.8

1.40

6–8 wk

17–22 wk

1.89

0.72

1.47

0.56

Various stages

1.1

0.86

1 mo

3 mo

6 mo

2.6

1.3

1.01

2.03

1.1

0.86

8 d

14 d

21 d

28 d

4.74

3.88

3.03

2.98

3.69

3.71

2.89

2.32

7 d

1 mo

12 mo

4.7

2.9

0.5

3.66

2.26

0.39

17 d

35 d

56 d

85 d

117 d

3.6

2.6

1.7

1.3

1.2

2.81

2.03

1.33

1.01

0.94

Up to 5 mo

1.1–3.4

0.86–2.65

0.5 mo

1 mo

2 mo

3 mo

4 mo

5 mo

6 mo

7 mo

8 mo

9 mo

4

2.75

2

1.5

1.4

1.2

1.2

0.8

0.9

0.8

3.12

2.15

1.56

1.17

1.09

0.94

0.94

0.48

0.52

0.48

2–6 d

12–16 d

21 d

2.2

2.3

2.3

1.72

1.79

1.79

Mature milk

2

1.6



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