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Journal of Nutrition Vol. 62 No. 4 August 1957, pp. 489-501
Copyright © 1957 by American Society for Nutrition
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The Calcium, Phosphorus and Magnesium Balances of Young College Women Consuming Self-Selected Diets1

Florence I. Scoular, June Kelsay Pace2, A. Nell Davis, Mattie Hall Finley, Sandra Kirkland, Sylvia Terry, Julia Shelton Wells, Patty Whitley Courtney and Margie Marshall Jones

School of Home Economics, North Texas State College, Denton

Calcium balances of 129 young college women (645 days), phosphorus balances of 125 women (500 days) and magnesium balances of 86 women (430 days) were determined.

The average total intakes of calcium, phosphorus and magnesium permitting positive balances in group I (16- to 20-year-old girls) were 1.50, 1.17 and 0.95 gm as compared to 1.70, 1.14 and 1.02 gm, respectively, for group II (over 20 years).

Based on height the average total intakes for positive balances were 9.1, 8.2 and 6.1 mg/cm for group I and 10.3, 7.0 and 6.4 mg/cm of calcium, phosphorus and magnesium, respectively, for group II.

The older subjects (group II) drank more milk, had higher calcium intakes and more positive retentions than the younger subjects (group I), while group I consumed more phosphorus and had more positive phosphorus retentions than group II.

Groups I and II consumed the same amounts of magnesium but group I had more negative balances than group II.

In general, more of the negative retentions occurred among the "taller" young women than among those below the average in height in each age grouping.

1 Originated with Faculty Research Funds and financed with Williams-Waterman Grants during 1954–1956.

2 Present address: Bureau of Human Nutrition, United States Department of Agriculture, Washington.

Manuscript received 4 February 1957.




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