False positive results may occur in the fecal occult blood test if patients have ingested (check all that apply)
i. alcohol
ii. bananas
iii. milk
iv. horseradish

Question

Quizplus · Accepted Answer

Positive results may occur in the fecal occult blood test if patients have ingested bananas or horseradish. Ingestion of other fruits, vegetables, and meats can also cause false positive guaiac tests.

False Positive Results May Occur in the Fecal Occult Blood