Vitamin C Lab Test & Other Interactions
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Vitamin C has an effect on the following lab tests:
- Blood-occult stool tests
- LDH (lactic dehydrogenase) test
- SGOT (serum glutamic oxaloacetic transaminase) test
- Glucose in urine
- Serum bilirubin
- Urine pH
People taking any of the tests above should discontinue vitamin C supplements at least 3-4 days prior to taking these tests, as the vitamin C supplements can interfere with the tests and produce incorrect results. People taking any vitamin C supplements should inform their doctor to avoid false tests results.
Vitamin C supplements can interfere with the results of certain blood test
Other Interactions with Vitamin C
Vitamin C has interactions with other substances as follows:
- Alcohol
- Tobacco
Alcohol can be metabolised much more quickly if vitamin C supplements are taken at the same time, cause a quicker time to getting drunk. People who drink alcohol should not take more than the tolerable upper limit of vitamin C.
Tobacco reduces absorption of vitamin C, so people who smoke cigarettes may become deficient and need supplementation.