Medication and Drugs
Laboratory Testing
Drug Tests

Can hair follicle drug test show amounts of drugs in your system?

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Wiki User
March 11, 2011 6:58PM

When they do hair follicle testing, they can see your drug history. Which means they can go back as far as your length of hair will allow them and it usually takes about a week for what ever it is that you used to grow out into your hair, and unfortunately there is nothing you can really do about it.