Guaiac Fecal Occult Blood Test (gFOBT)
The gFOBT checks for blood in feces and must be done every 3 years. You will take samples of your stools over three days, swab the samples on a chemically treated card, and send the card to the lab for analysis. If blood is detected, you will be advised to have a colonoscopy.
- Widely available
- DIY at home
- Not all cancers bleed, so the gFOBT can miss some cancers
- Handling samples is off-putting for many