Urinalysis - Understand the Test & Your Results
2021-7-20 · Occasionally, people taking vitamin C or multivitamins may have large amounts of ascorbic acid in their urine. When this is suspected to be the case, a laboratorian may test the sample for ascorbic acid (vitamin C) because it has been known to interfere with the accuracy of some of the results of the chemical test strip, causing them to be falsely low or falsely negative.
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