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A 19-year-old female asked:

I'm getting a blood test to check vitamin levels on the 9th. i smoked thc today. will it show up in the blood test?

2 doctor answers4 doctors weighed in
Dr. Donald Colantino
Internal Medicine 61 years experience
If the tests ordered on your lab work requisition did not request a toxic screen only the desired vitamin levels will be measured. However, to he sure fasting and no smoking before blood work is the best policy.
Dr. Gurmukh Singh
Pathology 49 years experience
The laboratory will not test for THC, unless the test is ordered/requested specifically. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/.

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Last updated Mar 7, 2021

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