Understanding Secondhand Marijuana Smoke Drug Test Cut Off Levels
Learn about the cut off levels for drug tests detecting secondhand marijuana smoke.
Understanding the Myth
The common belief that secondhand smoke can cause a positive result on a drug test for THC is a myth. THC, the psychoactive compound in cannabis, is fat-soluble and can be stored in body fat. However, secondhand smoke exposure is not sufficient to cause a detectable level of THC in the bloodstream.
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How Drug Tests Work
Drug tests, specifically urine tests, look for metabolites of THC in the body. These metabolites are produced when THC is metabolized by the liver. Secondhand smoke does not lead to significant THC metabolite accumulation in the body.
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Scientific Evidence
Multiple studies have shown that secondhand smoke exposure does not lead to positive drug test results for THC. The levels of THC in the urine of individuals exposed to secondhand smoke are well below the threshold for a positive test.