Stool-Based Testing — The FIT and gFOBT
Stool-based tests are non-invasive options that can be performed in the privacy of your home. These tests look for hidden (occult) blood in the stool, which can be an early warning sign of polyps or cancer.
FIT (Fecal Immunochemical Test): Uses antibodies to detect human hemoglobin. It requires no dietary restrictions and is performed annually.
gFOBT (Guaiac-based Fecal Occult Blood Test): An older method that uses a chemical reaction to find blood. It requires avoiding certain foods (like red meat) and medications (like aspirin) before the test.
If either test returns a positive result, a follow-up colonoscopy is mandatory to find the source of the bleeding.
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