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Department of Physiology, and Division of Animal Nutrition, University of Illinois, Urbana
The calcium balance of an adult human subject receiving a basal low-calcium diet with varying supplements of calcium in milk solids and in calcium gluconate was followed through out forty-three 4-day periods.
For equilibrium 9.2 mg. of calcium per kilogram of body weight per day were required, about three-fourths of which were supplied either in milk solids or in calcium gluconate. The calcium in both of these forms was equally well utilized, but only to the extent of 20%.
Manuscript received 2 November 1938.