Fecal Fat
(Fat Absorption)

Alternate Names

  • Quantitative Stool Fat Determination

Fecal fat testing measures the amount of fat content in stool, and is usually performed over a three day collection for the most accurate results. The results are used to diagnose any absorption or digestion syndrome caused by the presence of surgical removal of part of the intestines, Crohn's disease, sprue, Whipple's disease, gall bladder disease, cystic fibrosis, and pancreas or liver cancer. A special diet containing specific amounts of fat content will need to be followed for three days prior to the test as well as during the test. Since infants and children will not be able to eat a high-fat diet before the test, a mathematical formula is used to determine the amount of retained fat, and this value is expressed as the retention coefficient.


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