TABLE 5-4Accretion of Phosphorus (P) in Bone and Lean Tissue of Children Aged 4 to 8 Years Using Growth and Body Composition Data fromFomon et al. (1982)

Gender/Age (y)Change in Weight (g/y)Change in Lean (FFBM-osseous) (g/y)Lean-Tissue Pa (g/y)Osseous P (g/y)Bone Pb (g/y)Total P Gainc (mg/d [mmol/d])
Males
4–62,0001,8414.28916.958 (1.9)
6–82,3051,9574.59918.864 (2.1)
Females
4–61,7801,5003.455410.338 (1.2)
6–82,6601,6473.795710.840 (1.3)
Mean, both sexes50 (1.6)

NOTE: Based on recent data (Ellis et al., 1997), the daily accretion of phosphorus in bone is calculated from cross-sectional measures of whole body bone mineral content in children. The values are almost identical to those calculated using Fomon et al. (1982) body composition data. Compared were the values listed vertically in the Bone P column above, the data from Ellis yield values of 16 g and 14 g for males, and 15 g and 12 g for females, at the respective ages. This comparability of values obtained by two very different methods gives credence to the method applied for this report in deriving the EARs.

a

Assuming a phosphorus content of soft tissue of 0.23 percent.

b

Assuming a phosphorus content of bone of 19 percent.

c

Calculated from sum of accretion of P in lean and bone/year divided by 365 days.

Assuming a phosphorus content of soft tissue of 0.23 percent.

Assuming a phosphorus content of bone of 19 percent.

Calculated from sum of accretion of P in lean and bone/year divided by 365 days.

From: 5, Phosphorus

Cover of Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride
Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride.
Institute of Medicine (US) Standing Committee on the Scientific Evaluation of Dietary Reference Intakes.
Washington (DC): National Academies Press (US); 1997.
Copyright © 1997, National Academy of Sciences.

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