Research Article| Volume 63, ISSUE 1, P71-79, January 1964

Sites of magnesium absorption and excretion in the intestinal tract of the rat

  • Jerry G. Chutkow
    From the Argonne Cancer Research Hospital (operated by the University of Chicago for the United States Atomic Energy Commission), Chicago, Ill. U.S.A.

    From the Department of Medicine, University of Chicago Chicago, Ill. U.S.A.
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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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