C. Minerals

Measure

Calcium, mg

Phosphorus, mg

Magnesium, mg

Iron, mg

Zinc, mg

Iodine, µg

Selenium, µg

Estimated secretion in milkc 0.3–0.5h Increment in  RDAsd,e for the following periods of lactation:

168–280

84–140

21–35

0.18–0.30

0.9–1.5g

66–110

12–20

0–6 mo

400

400

75

0

7

50

20

6–12 mo

400

400

60

0

4

50

20

Comments

None

Based on a desired ratio of 1 to 1 for calcium to phosphorus intake

Estimated 50% absorption

Secretion during lactation is less than menstrual loss

Estimated 20% absorption

Based on need of infant, not maternal loss in milk

Estimated 80% absorption

a RE = Retinol equivalents.

b α-TE = α-Tocopherol equivalents.

c At volumes of 600–1,000 ml/day, based on milk composition shown in Table 6-1.

d From NRC (1989).

e Women aged 25 to 50.

f NE = Niacin equivalents.

g 0 to 6 months; see Chapter 6.

h 6 to 12 months; see Chapter 6.



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