it is a stool based test that detects blood in the stool
What sample is collected for FIT :
Why did my doctor recommend a fecal immunochemical test (FIT)?
Your doctor has recommended that you complete a FIT test to screen you for colorectal cancer. Colorectal cancer includes both colon and rectal cancer and is the third most diagnosed cancer in both men and women in the United States. Many colorectal cancers and deaths can be prevented with the use of established screening tests, one such test is the FIT test: