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View Full Version : How often do you have to smoke marijuana for it to show up in hair test?


mbsi
May 6, 2012, 11:35 AM
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?

Curlyben
May 6, 2012, 11:36 AM
Depends on the limits.

DrBill100
May 6, 2012, 12:56 PM
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 (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2274831/)
Musshoff & Madea (2006) (http://www.ncbi.nlm.nih.gov/pubmed/16628124)
Auwater, etal (2010) (http://www.ncbi.nlm.nih.gov/pubmed/20129747)

mbsi
May 10, 2012, 07:47 AM
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

steezen24
Aug 29, 2012, 02:00 AM
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/