The d-xylose absorption test is useful in the diagnosis of tropical and idiopathic sprue, 1–4 but results are variable in other disorders and in elderly persons without intestinal disease. 5,6 ...

A Schilling test is also known as a Vitamin B12 absorption test. It was formerly used to determine whether a person was absorbing vitamin B12 normally. If not, then the test could pinpoint the cause ...

Since the procedures adopted in all these studies varied greatly it is conceivable that the diversity and the inconsistency of the results were partly due to the lack of a standardized procedure. The ...

A team of researchers from St. John’s Research Institute (SJRI) has developed a new test to measure vitamin B12 absorption in humans with stable 13C isotopes. Earlier, this was possible only using the ...