Question

which of the following can cause a false positive when obtaining a specimen for fecal occult blood testing? collecting the sample from the first bowel movement of the day consuming vitamin c and iron supplements consuming a high fiber diet discontinuing prescription medications

Explanation:

Consuming vitamin C and iron supplements can interfere with the chemical reactions in fecal occult - blood testing and cause false - positive results. First bowel movement collection, high - fiber diet, and discontinuing prescription medications are not typical causes of false - positives for this test.

Answer:

Consuming vitamin c and iron supplements