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How far back does a hair sample drug test go?

April 26, 2017drug test hair Health sample

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How far back does a hair sample drug test go?

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It lasts as long as you have the hair. Figure hair grows 1/2″ per month, so if you hair is longer than 1.5″ then the residue will most likely show up. You may want to explain to them that you were in a situation 3 months ago where the smoke could not be avoided (imply second smoke) and you never have before and never will again engage in such activities. Better to explain it than have it show up like you were trying to hide something.