What Is Absorption In The Digestive System?

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D-xylose absorption is a laboratory test to determine how well the intestines absorb a simple sugar (D-xylose). The test helps determine if nutrients are being properly absorbed.

Alternative Names

Xylose tolerance test

How the test is performed

The test requires a blood and urine sample. For information on how these samples are obtained, see:

  • Clean catch urine specimen
  • Venipuncture (blood draw)

There are several ways to perform this test. A...

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