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American Journal of Clinical Nutrition, Vol 3, 418-420, Copyright © 1955 by The American Society for Clinical Nutrition, Inc.

Endogenous Calcium in the Feces of Adult Man and the Amount of Calcium Absorbed from Food

CONSTANCE L. BRINE PH.D.1 and FRANCES A. JOHNSTON PH.D1

1 From the New York State College of Home Economics and the School of Nutrition at Cornell University, Ithaca

The amount of calcium in the feces when the food contains none was found by plotting the fecal calcium of subjects reported in 51 studies in the literature against dietary calcium and extrapolating to zero. The feces were estimated to contain 75 mg per person per day of endogenous calcium. This figure was used in calculating the percentage of calcium absorbed in a compilation of reported studies which supplied intake and fecal values for calcium. The mean percentage absorbed on intakes from 400 to 599 mg per day was 43; on intakes from 600 to 999 mg, it was 34 to 35; and on intakes from 1000 to 1199 mg, it was 28.




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[Abstract] [PDF]


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Copyright © 1955 by The American Society for Nutrition