Patients must be instructed to abstain from ingesting meat and the drugs aspirin and vitamin C for 3 days for some brands of what type of fecal testing?

Question

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Patients must abstain from ingesting meat and drugs like aspirin and vitamin C for 3 days to avoid false positives in occult blood fecal testing. These substances may interfere with the accuracy of the test results.

Patients Must Be Instructed to Abstain from Ingesting Meat and the Drugs