AJCN Tufts Nutrition Symposium, Boston Sept 24-26
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American Journal of Clinical Nutrition, Vol 18, 449-451, Copyright © 1966 by The American Society for Clinical Nutrition, Inc.

Radiocalcium Absorption at Different Times of Day

JOSEPH SAMACHSON PH.D.1, JOSEPHINE SCHECK M.S.1, and HERTA SPENCER M.D.1

1 From the Metabolic Section, Veterans Administration Hospital, Hines, Illinois

In order to determine whether the absorption of calcium differed at different times of the day, tracer doses of Ca47 were administered orally with the morning and evening meal, in separate studies, to patients who were maintained on a constant dietary intake on the Metabolic Ward. The tracer dose was given to two patients on a low calcium intake, two on a medium calcium intake and two on a high calcium intake. The variability of absorption from morning to evening doses with any level of calcium intake was about equal to the variability of repeated morning doses ingested on different days, and the absorption of calcium was not consistently greater at either time of day. It therefore appeared that the ingestion of radiocalcium with a single meal reflected with reasonable accuracy the absorption of calcium during the day.






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Copyright © 1966 by The American Society for Nutrition