How Long Hair Drug Test
The hair follicle drug test when using the standard 1 5 inches of hair can detect previous drug use up to 3 months.
How long hair drug test. As a matter of fact hair follicle drug tests go back longer as opposed to urine drug tests. Therefore if you had let s say 12 long hair and the far ends of your strands were meticulously tested you could detect drugs used more than 2 years ago. An at home kits costs between 64 95 and 85.
Hair samples can come from the armpit or face so people who do not have hair on their heads can still take a hair follicle drug test. If a longer piece of hair is selected the drug test results can go back much further in fact years further to detect drug use. Hair grows at a rate of approximately 0 5 inches per month and drug testing labs will typically test for toxin metabolites that are trapped in the shaft core.
A hair drug test is more expensive than a urine drug test. The length of your hair sample can measure historical drug use but it s not possible to determine a specific timeline of usage.
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