digestive disorders
Stool Occult Blood Tests
Fecal Immunochemical Test (FIT)
The fecal immunochemical test (FIT) uses antibodies directed against human hemoglobin (a protein in red blood cells that gives blood its red color) to detect blood in the stool. For this test, people collect samples by using a kit at home similar to the guaiac-based stool test. If blood is detected, further tests are needed to determine the source. This test requires no dietary, medication, or vitamin restrictions. These newer immunochemical tests are more accurate than older guaiac-based stool tests and are preferred by most medical society guidelines for Colorectal Cancer Screening . The FIT is recommended annually for people for whom screening for colorectal cancer is recommended. 