A 35-year-old member asked:
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how long does thc stay in hair?

1 doctor answer
Dr. Byron Law-Yone
54 years experience Psychiatry
Depends..: Chronic use may show positive results for months. It depends also on the length/amount of hair tested and the nature of the test being used. Check this link for more details. http://www.ncbi.nlm.nih.gov/pmc/articles/pmc2274831/.
Answered on Sep 24, 2016

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