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Institute of Medicine (US) Panel on Micronutrients. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington (DC): National Academies Press (US); 2001.

Cover of Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc

Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc.

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TABLE 9-6Summary Illustration of Median Absorbed Iron Requirements for Infants and Young Children

Age (y)Weighta (kg)Estimated Surface Areab (m2)Estimated Change in Hemoglobin Massc (g/y)Basal Lossd (mg/d)
Infants 6–12 moh8.70.26
Males
1.511.60.534030.20.29
2.513.60.606419.80.33
3.515.50.670022.70.36
4.517.50.735321.80.39
5.519.60.799626.20.43
6.521.90.867526.70.47
7.524.70.942229.90.51
8.526.80.998035.70.54
Females
1.510.80.510433.50.27
2.512.80.584228.40.31
3.514.70.648622.50.35
4.516.80.716624.40.39
5.519.00.784520.70.42
6.521.30.852419.70.46
7.523.80.920929.90.49
8.526.90.998627.00.54
Total Iron Needg
Hemoglobin Iron Deposition (mg/d)Increase in Tissue Irone (mg/d)Increase in Storage Ironf (mg/d)Median (mg/d)97.5th Percentile (g/d)
0.370.0090.0510.691.07
0.280.0040.0380.621.24
0.180.0040.0230.541.23
0.210.0040.0250.611.36
0.200.0040.0210.631.45
0.240.0040.0190.701.60
0.250.0040.0150.741.71
0.280.0040.0110.811.86
0.330.0040.0060.812.01
0.310.0040.0380.641.25
0.260.0040.0320.631.30
0.210.0040.0260.591.32
0.230.0040.0230.651.45
0.190.0040.0160.641.52
0.150.0040.0110.661.61
0.280.0040.0110.791.83
0.250.0040.0050.801.92
a

Representative anthropometry for modeling, based on Frisancho (1990).

b

Computed by equation of Haycock et al. (1978).

c

Derived from Table 9-7.

d

Based on 0.538 mg/m2/d, extrapolated from Green et al. (1968).

e

Based on assumed 0.7 g/kg body weight gain (Smith and Rios, 1974).

f

Calculated as 12 percent of total iron deposition through 3.0 years of age then falling; no provision for storage at 9.0 years of age.

g

Estimates derived from simulated population that take into account impact of skewing and are the basis for the Estimated Average Requirement (EAR) and Recommended Dietary Allowance (RDA).

h

Requirements for infants and young children were estimated by different methods. Upper limit of absorption for infants and children is 10 and 18 percent, respectively. See text for methods used for infants and children.

From: 9, Iron

Copyright 2001 by the National Academy of Sciences. All rights reserved.

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