To complete stool-based tests, you will need to obtain a kit from your healthcare provider who can discuss with you which one to use. If you are doing a gFOBT, you will be required to modify your diet prior to the test:

• Avoid taking non-steroidal anti-inflammatory drugs (NSAIDs) 7 days before testing.
• Avoid taking more than 250 mg of Vitamin C a day for 3-7 days before testing.
• Avoid eating red meats for 3 days before testing.

• gFOBT - Typically involves taking a sample from stool and transferring it to a test card or tube.
• FIT – Typically involves taking a sample from stool and transferring it to a test card or tube.
• FIT-DNA - Requires the collection of an entire bowel movement.

The sample will be tested in a lab and you will be notified of your results. 

Blood in the stool may be caused by cancer or other conditions such as ulcers or hemorrhoids. If the test result is positive, a colonoscopy will need to be done to verify the cause of the bleeding and investigate further.

You may wish to consider the following when purchasing an at-home stool test:

• Results turnaround: Tests often provide results within days to weeks. People who are looking for faster test results may prefer to purchase a product with a shorter turnaround time.
• Insurance: Many at-home test companies do not accept insurance. People may wish to consider whether it would be less expensive to purchase a test out of pocket or go through a doctor’s office and claim it on their insurance.
• Accessibility: Most at-home tests are available through the manufacturer’s website. However, some tests, such as Cologuard, require people to either request a test through their doctor or attend a telemedicine appointment.
• Price: At-home test prices vary but are often between $30 and $90