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Calcium Excretion in Human Subjects at Two Levels of Milk Intake¹

Carver Foundation, Tuskegee Institute, Alabama

ABSTRACT

Eight male subjects were maintained for ten days on a low-nitrogen basal diet, supplemented with (1) milk to provide 91% of the total calcium intake, or (2) milk to provide 76% of the calcium intake and eggs to provide 7%. The apparent absorption of calcium when milk was fed at the higher level was 62 ± 8%, and at the lower level, 70 ± 8%. The per cent absorption of total calcium was slightly higher when milk was fed at the lower level; this difference was not significant. Fecal bulk on the dry weight basis increased by 77% when milk was fed at the higher level and fecal calcium increased by 119%; 45–54% of the additional 1.25 g. calcium at the higher level was absorbed.

¹ This study was supported by a grant from the National Dairy Council.