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A member asked:
How long will one puff of marajuana show up in a hair folicle test?
A doctor has provided 1 answer
It might not show.: In “pharmacokinetics of cannabinoids” by mcgilveray ij it is stated “hair tests are more likely to detect regular than occasional marijuana use. One study found that 85% of daily users tested positive for marijuana, versus 52% of occasional smokers (1-5 times per week).
Answered 11/30/2015
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