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Fecal occult blood test and fecal immunochemical test are the most common stool tests to diagnose many conditions that caused by bleeding in the gastrointestinal system, including colorectal cancer or stomach cancer.[2] The American College of Gastroenterology has recommended the abandoning of gFOBT testing as a colorectal cancer screening tool, in favor of the fecal immunochemical test (FIT).[3] The newer and recommended tests look for globinDNA, or other blood factors including transferrin, while conventional stool guaiac tests look for heme.