At a Glance
Why Get Tested?
To detect and measure excess fat in the stool; to help diagnose conditions causing malabsorption
When to Get Tested?
When a person has symptoms of malabsorption such as persistent diarrhea and fatty stools
A random stool collection; sometimes a 72-hour stool collection
Test Preparation Needed?
For a 72-hour stool collection, follow your doctor's instructions. Consume 50-150 grams of fat a day in your diet for 2-3 days prior to and during the stool collection period.