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-   -   How often do you have to smoke marijuana for it to show up in hair test? (https://www.askmehelpdesk.com/showthread.php?t=657780)

  • May 6, 2012, 11:35 AM
    mbsi
    How often do you have to smoke marijuana for it to show up in hair test?
    I have only smoked 2 times in 16 mon. Once 2 mon ago once 2 weeks ago. Both times were only 2 hits. I just did a hair test. Will I pass?
  • May 6, 2012, 11:36 AM
    Curlyben
    Depends on the limits.
  • May 6, 2012, 12:56 PM
    DrBill100
    Quote:

    Originally Posted by mbsi View Post
    I have only smoked 2 times in 16 mon. Once 2 mon ago once 2 weeks ago. both times were only 2 hits. I just did a hair test. Will i pass?

    It would be very unusual if you didn't. With the exception of cocaine, hair testing usually doesn't detect infrequent use of most drugs. That is particularly true for THC/THC-COOH as these marijuana metabolites have a very low incorporation rate into hair - urine is a far superior matrix for detecting use.

    If you had only 2 hits even within days of the test the chance of detection is virtually nil.

    Ref.

    Huestis, NIH, 2007 Cannabinoid Concentrations in Hair from Documented Cannabis Users
    Musshoff & Madea (2006)
    Auwater, etal (2010)
  • May 10, 2012, 07:47 AM
    mbsi
    Quote:

    Originally Posted by mbsi View Post
    I have only smoked 2 times in 16 mon. Once 2 mon ago once 2 weeks ago. both times were only 2 hits. I just did a hair test. Will i pass?

    Hair test came back negative
  • Aug 29, 2012, 02:00 AM
    steezen24
    Did you do anything to make sure you tested negative? Like shampoo your hair with a detox shampoo or using a method off the internet/

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