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Magnesium28 was administered to young male albino rats to determine the location of the major gastrointestinal sites of magnesium absorption and excretion. The results indicate that magnesium is absorbed throughout the intestinal tract, that in all probability more is absorbed in the ileum than in the jejunum, and that over 70 per cent of the total absorption of magnesium occurs in the colon. The pattern of the intestinal excretion of endogenous magnesium appears to be the reverse of absorption, with most of the loss occurring in the proximal gut.
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Accepted: September 10, 1963
Received: August 6, 1963
☆The Dunnett t test analysis digital computer program was designed by members of the Biological Sciences Computation Center, University of Chicago, supported by United States Public Health Service Grant No. 1-PO7-FR00013-01.
© 1964 Published by Elsevier Inc.