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The 5 g. d-xylose absorption test
  1. R. A. Joske,
  2. L. J. Haagensen
  1. Department of Medicine, University of Western Australia, Perth, Australia
  2. Department of Biochemistry, Royal Perth Hospital, Perth, Australia


    The 5 g. d-xylose absorption test has been studied in 50 normal subjects. The five-hour urinary xylose content was 1·75 ± 0·43 g. Xylose absorption was more rapid and more complete with the 5 g. than with the 25 g. test. Comparative studies showed the results of the two tests to be significantly related, but the 5 g. test was a less sensitive indicator of malabsorption than the 25 g. test. The 25 g. test is considered the more suitable for routine use in temperate climates.

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