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Does haircolor affect hair tests for drugs?


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Answered 2011-03-11 21:09:36

yes in that all drugs except THC will bind to the melanin of the hair so if for example a red head doesn't have the same melanin as a black haired person and it is the black and brown range that it binds to so the same amount can be given to a red head and a black haired person the black hair will show higher levels.

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