Proceeds from website advertising help sustain Lab Tests Online. AACC is a not-for-profit organization and does not endorse non-AACC products and services.

Fecal Fat

Print this article
Share this page:
Also known as: Qualitative or Quantitative Stool Fat; Stool Lipids; 72 Hour Fecal Fat; Fat Stain Oil Red O; Fat, Feces
Formal name: Fat, Fecal Qualitative or Quantitative

Board approvedAll content on Lab Tests Online has been reviewed and approved by the Editorial Review Board.

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 you have symptoms of malabsorption, such as persistent diarrhea and fatty stools

Sample Required?

A random stool collection; sometimes a 72-hour stool collection

Test Preparation Needed?

For a 72-hour stool collection, follow your healthcare practitioner's instructions; this may include consuming 50-150 grams of fat a day in your diet for 2-3 days prior to and during the stool collection period.