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Further Studies on the Calcium Requirement of Preschool Children^1,2,

Two Figures

Department of Home Economics, College of Agriculture, University of Illinois, Urbana

Seven preschool boys were subjected to a 40-week experiment during which calcium balances at different levels of calcium intake were determined for the purpose of assessing requirements for calcium. The values believed to be representative of the daily needs of the children were, in order of increasing age of the subjects, 150, 154, 137, 143, 148, 161 and 143 mg. On the basis of such retentions and at the rate at which each subject could utilize milk calcium, the daily requirements for dietary calcium have been computed, the resulting values being 843, 723, 685, 831, 1165, 826 and 803 mg. or 53, 44, 35, 50, 57, 37 and 40 mg. per kilogram, respectively. Assuming that children, under acceptable dietary conditions, could secure approximately 300 mg. of calcium daily from the non-milk foods which they eat and that such calcium is utilized to the same extent as is that of milk, the requirements of six of the children would have been met by a milk supplement no greater than 2 cupfuls. One subject would have needed as much as of a quart.

² Aided by a grant from the American Dry Milk Institute, Inc., Chicago.

Manuscript received 13 July 1945.