MeSH definition : A diagnostic test in which vitamin B12 is tagged with radioactive cobalt, taken orally,
and gastrointestinal absorption is determined via measurement of the amount of radioactivity
in a 24-hour urine collection.;
A diagnostic test in which vitamin B12 is tagged with radioactive cobalt, taken orally,
and gastrointestinal absorption is determined via measurement of the amount of radioactivity
in a 24-hour urine collection.