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Fecal Occult Blood (FIT)
Feces
Fecal Occult Blood (FIT)
Also known as: FOBT, Hemoccult, Occult Blood Stool
COMMON RANGE
0 – 0
µg/g
0
0
M
Mayo Clinic Laboratories
Adult
↗
See all sources ↓
CONVERT & COMPARE
µg/g
=
0
ng/mL
=
0
mcg/g
=
0
ug/g
Reference ranges across 10+ sources
Adult reference ranges from 3 entries across 3 named sources, shown in µg/g. Compare side-by-side.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
A
ARUP Laboratories
All
≥18y
0 – 0 µg/g
↗
M
Mayo Clinic Laboratories
All
≥18y
0 – 0 µg/g
↗
Q
Quest Diagnostics
All
≥18y
0 – 0 µg/g
↗
A
ARUP Laboratories
All · ≥18y
↗
0 – 0 µg/g
M
Mayo Clinic Laboratories
All · ≥18y
↗
0 – 0 µg/g
Q
Quest Diagnostics
All · ≥18y
↗
0 – 0 µg/g
About Fecal Occult Blood (FIT)
A fecal occult blood test (FOBT) checks for blood in a sample of your stool (poop). It's called occult (hidden) blood because you can't see it just by looking at it. And fecal means that it is in your stool.
Blood in your stool means there is bleeding in the digestive tract, which can be caused by a variety of conditions.
Colorectal cancer is one of the most common types of cancer in the United States. A fecal occult blood test can screen for colorectal cancer to help find the disease early, when treatment may be most effective.
Main source: MedlinePlus ↗
Useful for
A fecal occult blood test is commonly used as a screening test to help find colorectal cancer before you have symptoms.
The test may also be used to check for other conditions that can cause gastrointestinal (GI) bleeding.
Main source: MedlinePlus ↗
Interpretation
If your results from a fecal occult blood test show that you have blood in your stool, it means you likely have bleeding somewhere in your digestive tract. But that doesn't always mean you have cancer. Other conditions that may cause blood in your stool include ulcers, hemorrhoids, polyps, and benign (not cancer) tumors.
If you have blood in your stool, your provider will likely recommend more tests to figure out the exact location and cause of your bleeding. The most common follow-up test is a colonoscopy. If you have questions about your test results, talk with your provider.
For general wellness information only. Talk to a clinician about your specific results.
Main source: MedlinePlus ↗
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Related biomarkers
Often tested alongside fecal occult blood (fit) or part of the same panel.
Calprotectin
Feces
Fecal Elastase
Feces
Fecal Fat
Feces
Lactoferrin
Feces
Sources
A
ARUP Laboratories
M
Mayo Clinic Laboratories
Q
Quest Diagnostics
Last updated 2026-05-02
This page aggregates publicly available reference data and clinical information from Mayo Clinic Laboratories and other sources. For general wellness information only — not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.
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