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Marijuana, THC And Drug Tests…How Long Does Weed Stay in Your System?


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#1 3MG Feeds

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Posted 06 January 2013 - 01:10 PM

Don’t assume anything! The best way to truly establish the level of THC in your blood is to test yourself.


With the potential for job loss based on recreational marijuana consumption or the much dreaded DUID, now a real possibility. It’s important to understand the various drug testing methods deployed by potential employers or the various law enforcement agencies you might encounter… and just how the different drug screening manufacturers measure THC in your blood system.
While there are any number of factors that go in to getting a consistent and accurate result from the average THC test, and some methodologies are better than others. The utilized information from California NORML – Marijuana.com – or PassaDrugTest.com is the best and most accurate data regarding the testing of humans for THC in their blood. That being said, the provided material is merely a guideline…or approximation. Since testing for delta-9-tetrahydrocannabinol (Δ9-THC) has many potential variables which can radically alter the outcome of your test from positive to negative, or vice versa.


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So – the glaring question that needs addressing is… Just How Long Does Marijuana / THC Stay in your System?
Should you happen to be a recreational marijuana smoker (like me) that lives in either Washington or Colorado (damn, not me) this might be some good money-saving information to learn, remember and practice. As the current approach which law enforcement – and for that matter – employers practice in their attempts to detect marijuana, or its active cannabinoid THC in the human body creates more questions than answers – these DUID facts might help you retain your freedom (or get that dream job) the next time you face passing a required drug test.
Don’t assume anything! The best way to truly establish the level of THC in your blood is to test yourself. Regardless of whether or not you are applying for “the job of a lifetime”, or just driving down the road, testing yourself for THC is cheap and easy to do…and can save you a lot of hassle as you travel down the road of life.



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As most are aware, the drug test technique of choice utilized by both employers and law enforcement alike, require a urine, saliva or hair sample. While all of these tests are simple to take, each has the ability to detect pot consumption from a varied length of time in your personal history. Which as it turns out, is incredibly important to know. A piss urine test for the detection of THC is hands-down the most commonly utilized due to its affordability, in addition to its longer detection time (unlike the saliva test). While there are several key factors that can impact how long THC will linger in your urine, here are a couple of the more important variables to consider:
How much do you weigh?
What is your percentage of body fat?
How much marijuana do you smoke?
How often do you smoke marijuana?
As many of these variables will come into play for each person in different ways, there is no concrete – set in stone way of determining just how long you might test positive for THC.


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When participating in a Urine Drug Test, your marijuana’s THC can show as a positive result in as little as 2-5 hours from your last consumption. The length of time for THC to show up on a urine drug test is generally best estimated based on how often you smoke pot. That being said, it’s a bit of a generalization as one also needs to take into account the body fat and weight of the weed smoker:[indent]
Only smoked pot once in your life? You may test positive for THC for the next 1-6 days.
So you’re only a moderate pot smoker? You may test positive for weed the next 7-13 days
All right… So Frequent marijuana consumption is your gig, you may test positive for the next 15 or so days
So you fire up on a regular basis? There’s a good chance you can test positive for pot for 30 days or more
Do you live in the ‘Snoop Dogg’ realm of pot consumption? You may be loaded with THC for the next 45-90 days from your last puff on a good joint[/indent]
If you are fortunate enough to only be facing a Saliva Drug Test for marijuana consumption and you haven’t smoked in the last 24 hours, the chances are good that you might pass. THC from pot will only test positive for about 12 hours from the last time you smoked.
Conversely, should you be asked to give a hair sample for a drug test, you might have a bit more to be concerned about. Hair used in a Drug Test will show THC’s presence for approximately seven days from its last consumption – now with stepped-up interest on the topic, several drug tests are offering the ability to check as far back in your personal use history as three months.
No matter how you slice it …knowledge is power.  Stay employed, out of trouble and considered clean by all who test you.

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