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  • December 24th, 2010

    Hair Follicle Drug Test Information

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    Hair Follicle Drug Test Information

    Drug tests are named after the sample that is extracted for checking of drug residues. The sample can be body hair or body fluids like urine, blood, saliva and sweat. Thus we have urine test, blood test, saliva swab test, sweat test and the hair follicle drug testing. The urine test is the most common of all the drug tests. This is because it is a sort of an optimum test in all respects – detection time, cost and accuracy. Marijuana is the most popular among all the consumed drugs. Tetra hydro cannabinol (THC) is the psychoactive element in marijuana. Therefore urine drug testing for THC is the most common test to which you are likely to be subjected.

    The hair test is the most accurate drug test. It also happens to be the most expensive. The test is usually conducted by armed forces for checking drug consumption by recruits. In this case, the fitness of future soldiers is of paramount importance and overrides all other considerations – including expenses involved in testing. This test can trace drug consumption history for the longest duration. An example will bring out the point. Urine test can determine marijuana use by chronic users for a maximum period of 90 days after it was last used. The corresponding detection periods for the saliva and blood tests are 24 hours and 12 hours – 7 days respectively. A standard hair test can detect marijuana use for up to 90 days after it was last used. And, advanced versions can do so for up to 3 years.

    Here is some more hair follicle drug test information:

    A. Human hair comprises of 3 concentric layers.

    B. Drug residues accumulate at the base of the middle layer of the hair, known as the cuticle. This is the reason why the residues are retained for such a long duration. This is also the reason why the test is not that easy to cheat on.

    C. During testing the outer layer of the hair is dissolved and the cuticle is examined for presence of drug residues.

    D. To beat this test, a detox shampoo and conditioner is required. The shampoo opens up the outer layer of hair and seals the cuticle. A conditioner restores the appearance of hair that will be disturbed due to opening of the outer layer. The sealing of the cuticle prevents detection of drug residues, if any, in the cuticle.

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