Why dont they do Hair testing???
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Hair tests can only test as far back as maybe 90 days...Not only that, from my understanding(I could be wrong), it can trace every substance a person has taken, but how would doing the hair test prove that the substance wasn't taken a long time ago ?
For example, if someone smoked weed 5 years ago and never smoked again since, it would still show up on the hair test !!Comment
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