JAMA. 1922;79(12):968. doi:10.1001/jama.1922.02640120042016.
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As was noted in The Journal1 at the time, experiments completed about two years ago established the average calcium requirements of normal maintenance, and showed that a considerable proportion of American dietaries fail to meet this requirement and must therefore be considered subnormal as regards their calcium content. The calcium requirement of growth being relatively larger than that of maintenance, it follows that there is real and frequent danger that children's dietaries may fail to furnish as much calcium as is needed for the support of normal growth and the optimal development of the bones and the teeth; hence the need of an abundance of calcium-rich food in the diet of growing children. That adequacy of calcium intake is an extremely important, and may often be the crucial, factor in the feeding of children has been recognized by students of nutrition, but a satisfactory definition of the child's needs


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