How Long Does Weed Stay In Your System? (2017)

One’s First Question: “How Long Does Weed Stay In Your System“.  As you have probably seen in your own research, this answer can be confusing and not always clear.  There is an almost overwhelming amount of information on the internet and as a result there is no conclusive answer to the question of how long does weed stay in your system.  As a matter of fact some of the existing information on how long does weed take to leave your system is just plain misleading.

Why Did We Right This Article At This Time?  Always Test Clean has written this article specifically to clear up the overall ambiguity on how long weed can stay in your system and in addition how to pass a drug test for weed.  We will address not only urine, but also the saliva (mouth swab), hair and blood tests.  We also intend to clear up the misinformation and set the record straight on these topics so you can make an informed decision.  First and foremost, we hope this information will be particularly helpful when used along with our series on How To Pass A Weed Drug Test.

All Times For How Long Is Weed In Your System Are Just Estimates. The timing for how long is weed in your system can vary substantially from person to person.  In addition, the weed drug testing technology has evolved over the past few years.  What was true a few years ago about the weed drug test might no longer be true.

We Will Clear Up Confusion and Misinformation.

You Must Have The Most Up To Date Information To Make That Informed Decision.  Many of the sources you are researching are using old data or do not take into account the many Personal Variables that can have a great effect for how long is weed in your system.  Sources that provide a fixed time of say 30 days are just misleading you and are setting you up for failure.  Always keep in mind everyone has different weed detection times.

Above all this Always Test Clean article will ultimately clear up much of the disinformation and confusion that exists on the internet concerning your how long is weed in your system.  This article has been written to be as accurate as possible with the most current information.  We also provide links to the best authorities so you can check our research and be sure of its timeliness and accuracy.  Trust the science.  You are in good hands with Always Test Clean.


How Long Does Weed Stay In Your System?

Ironically, the question of how long does weed stays in your system is changed by each persons unique Personal Factors.  Because of this, it is hard to make a hard fast decision on the weed detection time frame. By in large infrequent users with a fast metabolism will have the shortest detect times.  Frequent or chronic users with a slow metabolism will have the longest times. Ultimately, the only way to estimate a reliable time fame for how weed stays in your system is to consider the lower and upper bounds and adjust for your own personal factors.  We always publish confirmed times from reputable sources.  We do not guess or use marketing ploys.  Check our provide links to the best authorities so you can check our research and be sure of its timeliness and accuracy.

Above all be conservative and base your final decision on your personal worse case.  Do your own research.  Use the suggested links below or search for yourself.  A word of advice, stay away from sites that are not based upon research and do not provide proof of their statements.  Your job and your life style may depend on that information.

How Long Does Weed Stay In Your System?
  Starts 1 Time <4 Times
Month 
3+ Times
Week 
Daily
Urine 2 Hours 5 – 8 Days 11 – 18 Days 22 – 35 Days 49 – 63 Days
Saliva 1 Hour 12 Hours 34 Hours 48 Hours 72 Hours
Hair 7 Days 90 Days 90 Days 90 Days 90 Days
Blood 1 Hour 1 Day 1 Day 2 Days 5 Days

The Above Are Accurate and Actual Times Taken From Industry. 

More Information On Specific Weed Detection Times:

Weed Urine Test

Weed Saliva Test

Weed Hair Test

Weed Blood Test


Weed Will Stay In Your System Longer The More You Use Weed.

For the more heavy users of weed, the weed detection times can extend substantially beyond the charts you find on the internet.  The chart below was taken from The National Drug Court Institute – Marijuana Detection Window. (NDCI) Fact Sheet on the Marijuana Detection Window.  AS you can see, the longer you use the longer the detection times.  The National Drug Court Institute short-term use of weed detection times are very similar to the Mayo Clinic.


Personal Factors That Greatly  Affect How Long Weed Is In Your System.

First of all each of us has a unique metabolism that processes weed at a different rate. Even with people of the same gender and age, ones individual lifestyle choices such as levels of exercise and eating habits may also affect the amount of time required to pass a drug test for weed.

The Personal Factors For How Long Weed Is In Your System Are:

  • Amount and Frequency of Weed Use: Single or smaller doses of weed are generally not as detectable for as long a period of time as chronic or long-term use.  Yes, one hit of weed might be detectable.  Second hand weed smoke is a possibility, but not a given.
  • Potency Of The Weed: High potency strains of weed have been developed over the past decades. Some of the world’s strongest weed strains are now pushing 35 percent THC 
  • Metabolic Rate: Individuals with slower body metabolism are prone to a longer weed detection times. People with high metabolisms tend to have a somewhat shorter times for most tests.
  • Body Mass: Your Individual body mass index (BMI) has a direct affect on weed detection times.. Metabolism slows with increased body mass which in turn causes a longer weed detection time. Correspondingly, the higher ones body fat content, the longer the weed detection for the urine and saliva tests.  The weed drug detection times for higher fat content do not change with the hair or blood test.
  • Physical Activity: Physically inactive individuals tend to have a longer longer time to detect weed in general.
  • Age: Human metabolism slows with age resulting in a longer time to detect weed times in general.
  • Overall Health: Human metabolism slows during periods of bad health which can result in a longer time to detect weed.

Why Does Weed Stay In Your System So Long?

Weed stays in your system for a long time because cannabinoids (thc metabolites) are stored in your fat cells.  More fat, more storage space, more THC metabolites.

Learning how long does weed stay in your system based upon metabolites stored in your urine and hair.These THC metabolites are what the urine or hair drug tests detect.  The presence of the weed metabolites and not the presence weed is the primary indicator of weed use in the urine and hair programs.

What Is A Metabolite?  

When you consume weed by any means, the THC in weed enters your bloodstream and gets you high.  After your body processes the THC it creates THC metabolites .

These THC metabolites are stored in the fat cells of your body as well as most of your slower growing cells like hair, finger nails or even teeth.  These THC metabolites in your fat will leach out into your blood slowly over time and your kidneys will move these THC metabolites to your urine which can detect weed long after your use.  The weed urine test has been designed to detect the presence of THC metabolites in your urine.

These metabolites become entrapped in your fat cells or in any hair growing on your body in amounts roughly proportional to the amount of the substance ingested. 


How Long Does Weed Stay In Your System For Urine, Saliva, Hair And Blood?

We will explore how long weed stays in your system for urine, saliva (mouth swab), hair and blood.  As we have said before, each of these drug tests has their own unique weaknesses in which we can take advantage and each of these drug tests has their own unique strengths that we must avoid. 

We hope this information will be particularly helpful when used along with our series on How To Pass A Weed Urine Test.

How Long Does Weed Stay In Your Urine?

There is way too much variation due to various personal factors to give a finite time frame for how long weed will be detected in the weed in urine of an individual.  Infrequent users with a fast metabolism will have the shortest urine test for weed.  Frequent or chronic users with a slow metabolism will have the longest urine detection times. The only way to estimate a urine detection time is to consider the lower and upper bounds and estimate based on the factors outlined here.

How Long Does Weed Stay In Your Urine?
Detection Starts: 2 Hours
1 Time Only: 5 – 8 Days
2 – 4 Times / Month: 11 – 18 Days
3 – 5 Times / Week: 22 – 35 Days
Daily: 49 – 60+ Days

Plan On Your Worst Case And Be Safe.

Independent Sources For How Long Does Weed Last In Your System.

  • Marijuana.com is a good independent source of how long weed can be detected in your body.
  • Alere is the leader in drug testing products and this is why we provide Alere drug tests with each urine product.  This is so you can test yourself to make sure you will pass a weed drug test before being faced with the real thing.  You may review the Alere Drug Detection Times and make the weed drug detection time decision for yourself.
  • The probably the most trusted reference laboratory for drug testing information.  For more information on weed detection times check out Mayo Clinic Drug Detection Times.

Return To How To Pass A Drug Test For Urine.


How Long Does Weed Stay In Your Hair?

Weed detection in hair starts about 7 days after use.  This 7 day start time is very difficult as the hair sample would need to be taken at the scalp.  A more realistic start tie would be 2 – 3 weeks after use.  

Head hair grows at about 1/2 inch per month and most hair testing is restricted to a 1 1/2 inch sample closest to the scalp.  This means a typical hair drug detection time is about 90 days. Please consider this: if an additional 1/4 inch is taken by mistake or on purpose, that means an addition 2 weeks of hair drug detection time. 

Any Hair On Your Body Can Be Used For The Weed Hair Test.

Any hair on the body can be used for the weed hair test.  Body hair grows slower than head hair so the corresponding detection periods so a body hair sample will provide a longer weed drug detection time.

For hair testing drug detection times we reference the Omega Labs, a major supplier of hair testing.  The Omega Labs also provides a good question and answer section on blood drug tests from the perspective of the people giving the tests.

How Long Does Weed Stay In Your Hair?
Detection Starts: 7 Days
Typical: 90 Days

Plan On Your Worst Case And Be Safe.

 We hope this information will be particularly helpful when used along with our series on How To Pass A Hair Drug Test For Weed.

Return To How To Pass A Drug Test For Hair.


How Long Does Weed Stay In Your Saliva?

First of all, the saliva, mouth swab and oral drug test are the same test.  The saliva tests for weed simply involves using a swab that looks very similar to a common toothbrush, but in place of bristles a swab is used to collect the saliva.  The swab is placed between the lower cheek and gum for about two minutes.  Once saturated it takes a few minutes to produce a pass or fail on the spot.  

The Time Weed Is Detectable In Saliva Is Short.

The saliva test provides a typical detection time of a few days. The saliva screening can be given without notice, without taking one to a special location and can be given without special handling or training.  Within a few minutes an untrained person can read the test and even pass judgement on you.  You then are judged guilty and must prove yourself innocent.

For saliva weed detection we trust the Basel Study For Drug Detection Times which is based upon actual detection times in studies in a controlled environment.

How Long Does Weed Stay In Your Saliva?
Detection Starts: 1 Hour
1 Time Only: 12 Hours
2 – 4 Times / Month: 34 Hours
3 – 5 Times / Week: 48 Hours
Daily: 72 Hours

Plan On Your Worst Case And Be Safe.

We hope this information will be particularly helpful when used along with our series on How To Pass A Saliva Drug Test For Weed.

Return To How To Pass A Drug Test For Blood.


How Long Does Weed Stay In Your Blood?

Most often weed blood testing is ordered by insurance companies for use identification or legal confirmation and justification.  Blood drug tests detect the presence of the actual drug in your blood and not drug metabolites created by your body as in the urine weed drug test.  A blood weed drug test is relatively rare and is very costly to administer. A blood drug test typically is concerned with use at the point in time of your test only.  The blood drug test must be given by a qualified individual in a controlled environment and be sent off to a laboratory for analysis.  It can not be judged on the spot and should take about a week to get the results.

Your Will Probably Be Faced With A Urine Drug Test For Weed Too.

A urine drug test  is often ordered at the same time as a blood test.  Be prepared for both.  The urine test is also given as it can look at contamination over a longer period of time.  The combination of a blood and urine test provides a much broader look at the subjects drug usage habits and provides substantially different information about you, your health and your personal habits.

How Long Does Weed Stay In Your Blood?
Detection Starts: 1 Hour
1 Time Only: 1 Day
2 – 4 Times / Month: 1 Day
3 – 5 Times / Week: 2 Days
Daily: 5 Days

Plan On Your Worst Case And Be Safe.

We hope this information will be particularly helpful when used along with our series on How To Pass A Blood Drug Test For Weed.

Return To How To Pass A Drug Test For Blood.