Marijuana Drug Test: Is the 30 Day Rule Fact or Fiction?

Marijuana Drug TestMany believe if you abstain from cannabis for 30 days, you’ll pass a marijuana drug test. Here’s a look at whether or not that’s true.

So, you’re up for a new job! What other reason would you want to know how long THC stays in your system? A marijuana drug test of course! Congrats on the career change; here’s to hoping cannabis doesn’t ruin your chance at a new cubicle (or working from home).

Marijuana drug test lore suggests that THC stays in your system for ten or so days,but the answer isn’t really that black and white. Rather, all sorts of variables play a role including your size, your metabolism, and your tolerance.

Thus, the answer to this question: it depends. There, you’re welcome.

Marijuana: The More You Smoke, The More You’re Screwed

Smoking lots of marijuana sets you up to fail a drug test: that much is clear. But heavy marijuana users are likely to fail even after a period of abstaining from the herb. According to a study published in Drug and Alcohol Dependence;

THC is detectable in urine tests after two weeks of abstinence in people who smoke regularly (and two weeks is a conservative estimate)

Other studies draw a similar conclusion; in people who use marijuana routinely (every day or close to it), THC can stay in the system for months. This doesn’t mean the person remains high the entire time (sorry!); it merely means that the drug hasn’t been fully excreted from their system yet. Urine tests, similar to hair tests, don’t measure the amount of THC; they measure the level of THC metabolites.

The Variables that Play a Role

As mentioned above, several variables work together to either remove or hold onto THC; two people who share a joint one Friday night at a party can easily have drastically different drug test results come Monday.

Body fat plays an important role in this regard: plainly, the more body fat you have, the longer it’ll take THC to leave your system. This is due to the fact that THC metabolites are lipid-soluble and accumulate inside fat reserves. Ergo, a person with more fat offers more places for THC to make itself comfortable.

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A fast metabolism is helpful to removal – the faster your metabolism, the faster THC metabolites decrease – as is drinking lots of water.

Dehydration causes the urine to concentrate, priming it to release THC and return a positive result

Naturally, the frequency of use plays, perhaps, the most important role (as the aforementioned study shows). If you smoke a joint socially every once in a while, you’re much less likely to fail a drug test than someone who smokes with any kind of regularity.

It’s believed that everyday factors like diet, exercise level, and stress also contribute, but to what degree isn’t certain. Exercise and spicy foods increase your metabolism, so it makes sense that they’d speed up the removal of THC from your body. The moral of the story? If you’re scheduled for a drug-screen think jalapenos and jazzercise.


Marijuana Drug Test: The 30-Day Rule

The 30-day Rule is often circulated in marijuana-loving circles as the gold-standard in which a person will test negative: if you don’t smoke for a month, you’re good to go. But, in reality, it’s rare for a readable amount of THC to stay in your system for that long; it can occur, but it’s an exception rather than a rule.

A study published back in 1989 by the National Institutes of Health found that the average length of time until THC was no longer traceable was 9.8 days. A study conducted five years prior showed similar results with 8 out of ten subjects testing cleanly in under two weeks.

A lot of this has to do with testing limits. For workplace testing, the usual cutoff is 50 ng/ml – most people test negative after around a week and a half of no marijuana exposure. If the limits were lowered, to 20 ng/ml for instance, the detection window widens to around three or so weeks.

What about CBD Consumption?

Standard drug testing tests for THC metabolites, not CBD. In other words, consuming CBD oil or wearing a CBD patch isn’t likely to result in a positive test.

Some CBD products contain small amounts of THC, but most of the limits are so low they aren’t likely to do anything

The exceptions of this are cannabis strains high in CBD as they’re often high in THC as well (and if not “high,” certainly much higher than what you’d find in CBD oil). This isn’t always the case, as some CBD strains are quite low in THC, but most have some measurable amounts of the cannabinoid.

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Marijuana Drug Test: Beating the Screening

If you’re applying for a new job and you’re a frequent smoker, the best thing you can do to stop a positive result is to abstain from cannabis use (I’ll pause for your laughter). If that’s not a task you’re willing to do (or unable to do in regards to medicinal use); there are other tricks of the trade (or tricks of the charade).

Some people turn to synthetic cannabinoids as a way to alter the tests; these are risky (for your wellness and your result). And some testing labs are onto this scheme: if you take a synthetic cannabinoid, it’ll show up on the report and everyone will know you’re a cheater, cheater, pumpkin eater.

Other people swear by detox drinks and B vitamins, but water is a viable option too

Water flushes out your system (and the THC inside it). But don’t wait until the day of your test to suddenly go full on camel; start flushing it out a few days before. If your urine is too diluted and you’re overhydrated from drinking way too much H2O; it can invalidate the test (and it’s not great for your kidneys either).

Also be aware that there are other drug tests than urine test. Hair, saliva and blood test are also commonly used to determine if someone has been using Cannabis over the past few days or weeks.

And, of course, never smoke in the days right before a test. It’s a pain in the butt, sure, but it’s only a few days; put down the ganja and just have some vodka.

Click Here To Lean More About Drug Testing, and How to Pass a Drug Test

How to Pass a THC Test

By Green Gone LLC

What makes detoxing from marijuana so hard?

There are 3 major issues with most detox products attempting to remove cannabis from your system:

  1. High lipophilicity of metabolites – Simply put, THC is fat soluble and the metabolites tend to get stuck in fat cells as a result.
  2. High protein binding of metabolites in the blood stream to albumin – your body can only eliminate free unattached THC through the kidney and bowel.
  3. “Bottleneck” of metabolite formation in the liver. In order for your body to clear THC your liver has to turn it into a variety of more water soluble metabolites.

Depending on the level of usage and the person in question (age, gender, size etc.) the half-life or time the drug stays in your body varies greatly. A one-time user typically taking 3-5 days to test negative, infrequent use possibly taking more like a week to 10 days, and daily consumption can take several weeks to well over a month. There are also case reports of well over a month to 2 months in large (over 200 pound) and heavy users (daily or multiple times daily).

What can you do?

Dilution – has its limits. If you over dilute your urine the site won’t accept the sample, as it won’t meet urine creatinine and specific gravity requirements for validity.

Fiber – this helps to clear more drug through the bowel and helps bind some.

Still often times this will not be enough if it could take potentially several weeks to test clean and you are fearful of a random, on probation, or about to take a pre-employment screen and can’t wait that long. You need a detox product that actually works and makes sense. No overly complex instructions, no gimmicks.

The perfect detox would:

  1. Provide reliable results
  2. Not have time sensitive directions
  3. Be permanent
  4. Not have complex instructions
  5. Hit THC from multiple angles to get it out

Green Gone is a new product on the market that does just this! If you want a permanent cleanse in a pinch you can’t beat it. You can learn more about it at

What makes it so good?

Green Gone is a capsule containing 5 key ingredients that will get the job done. A basic salt helps to increase urinary pH to help dissolve more THC into urine to dump it. A fiber source helps bind THC in the gut to be excreted in feces. A natural non-steroidal anti-inflammatory helps boot THC out of your blood. A liver inducer helps boost liver metabolism. Last but not least a diuretic helps to both dilute your urine, and increase urine volume for higher clearance.

Other benefits of picking Green Gone!

  1. Proven THC metabolism and elimination 215-330%+ increase
  2. Extremely affordable, especially after discount code and free shipping!
  3. Extremely safe, all natural vegan approved ingredients
  4. Made in the USA at a GMP approved, FDA inspected facility
  5. Simple kit instructions
  6. Excellent customer support
  7. Fast and free shipping options available including overnight!
  8. All backed by a money back guarantee!

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How Long Does Marijuana Stay in the System (with Infograph)

Below is an infograph detailing how long marijuana stays in your system.

The data used to create this infographic is gathered from research on drug testing methods and the information presented by drug screen manufacturers. Some resources include Redwood Toxicology, Cannabis Drug Testing, California NORML. The information presented is only a guide or estimate since drug testing has many variables that can influence a positive or negative outcome.

How Long Does Marijuana Stay in your System? is a frequent question posed by cannabis consumers. While there is no definitive answer, below are some guidelines. The only way to really know if you are positive is to test yourself. You can test yourself with a cheap drug test and know if you are positive.

How long does THC stay in your system?

The most common drug tests used are urine, saliva and hair. Each test has a different detection time which is important to know. The urine drug test is the most commonly used because it is cheap and has a longer detection time than a saliva test. There are several very important factors that can influence how long THC will be present in your urine:

  • Weight
  • Body Fat
  • Amount Used
  • Frequency of Use

Since these factors will vary greatly for each individual, there are no definitive guidelines to tell you how long you can test positive for THC.

On a Urine Drug Test, THC will appear as a positive within 2-5 hours of use. How long it will still show on a urine drug test is estimated based on frequency of use, but does not take into account the weight and body fat of the marijuana user:

  • One Time User may show positive for 1-6 days
  • Moderate User may show positive for 7-13 days
  • Frequent User may show positive for 15 or more days
  • Heavy User may show positive for 30 or more days
  • Some Heavy Pot Smokers have reported being positive 45-90 days after quitting

On a Saliva Drug Test, THC will test positive within one hour of use, but may only show positive for about 12 hours after last use.

On a Hair Drug Test, THC will show up about 7 days after use and most hair drug tests will test for a 90 day period. However, THC does not always bind to the hair follicle which makes it not always considered an accurate testing method for marijuana use.

The most reliable way to know if you are testing positive for marijuana use is to drug test yourself.

And now for the infograph:

how long does weed stay in your system


How to Pass a Drug Test for Marijuana

By Verdant Detox

scopeAre you in the process of getting a new job and dreading the pre-employment drug screening? You’re not alone. Testing for marijuana is an unfortunate reality for many of us and the process is never fun (even if you’re clean). To assist you and calm your nerve’s we put together a short but comprehensive overview of drug testing and how to pass them. Specifically, we addressed how to pass a urinalysis screen since it’s the most common type of testing performed (accounting for approximately 75% of all pre-employment drug tests).

THC in Your System

The biggest question everyone has when they find out they have to take a drug test is “how long will THC be in my system”. The short answer is that it’s different for everyone. According to most experts, the amount of time marijuana stays in your system is anywhere from a week to a month. Important factors included in the equation are:

  1. Frequency and quantity of use;
  2. Rate of metabolism and eating habits.

THC metabolites are stored in fat and released through the body’s excretion systems (urine, “Number 2” and sweat). Speeding the body’s excretion systems up are the most natural ways to remove THC from the system.

 4 Weeks until Test

If you have 4 weeks or more until your test then in most cases you won’t need to do anything out of the ordinary other than quit smoking. If you’re in generally good health then your body should naturally metabolize the THC from your system. That being said, if you feel the need to take extra precautions, we’d recommend following the steps from the section below.


3 Weeks until Test

If you have 3 weeks until your test then in most cases you can still pass naturally as long as you’re following habits that would ensure the THC in your system is metabolized. These include:

  1. Eat a ketogenic diet; it forces the body to metabolize fat which is where THC is stored. This is in contrast to a glycosis state, where blood glucose (sugar) provides most of the energy.
  2. Drink at the very least eight 8-ounce glasses of water a day; this will help flush your system as well as assist you in maintaining a healthy metabolism.
  3. Drink green tea; like water, this will lower THC levels through its diuretic properties and make an individual urinate a lot which technically washes out the kidneys.
  4. Exercise and hit the sauna, steam-room and or Jacuzzi; all of these will speed up your metabolic rate and remove THC from your system quicker.

2 Weeks until Test

If you have 2 weeks until your test then you’ll want to start looking at detox products as well as following the guidance provided in the section above. Currently on the market there are some reputable herbal detox kit’s that are gentle on the body. Although there isn’t much scientific evidence to support these products, the logic behind their blends makes sense in aiding the body in removing THC metabolites.

1 Week until Test

If you have 1 week until your test then you’ll want purchase a detox kit. We recommend the Verdant THC Detox Kit. Verdant Herbals has a safe and reliable 48 detox kit that contains ingredients found in most diets (vitamin B and creatine).

24 Hours until Test

Although we’d never recommend waiting until you have 24 hours until a drug test to prepare for it to look for detoxing options, there are some available. The majority of these are fairly harsh drinks that mask the fact that THC is in your system. The risks associated with these are that they don’t actually remove THC from your system but hide it and sometimes the lab can tell or will need to retake the test since it was skewed.

Remember it’s all about frequency of use and rate of metabolism. Take time to prepare and passing a drug test shouldn’t be hard for anyone. Good luck everyone!


Click here to learn more about Detox Products that work

How Long Does THC Stay In Your Body?

By Robert Bergman,

Close-up of Marijuana Plant

Drug tests vary quite a bit, so this article is meant to provide you with general guidelines rather than all-inclusive facts, so please take the information with a grain of salt. Most people want to know exactly how long marijuana stays in your system so that you can effectively pass a drug test. Despite all the information we will provide you with, the best way to know for sure if marijuana is still in your system is if you actually perform a drug test on yourself. You can get cheap THC urine drug tests relatively easily.

Part of the issue with determining exactly how long the marijuana remains in your body is the fact that it depends greatly on how often you use marijuana. If it’s only once every couple months, for example, or even once per week, there is probably not a buildup in your body, meaning marijuana will leave your system within just a few days. If you use marijuana heavily or frequently, however, then it could take a month or even longer just to be sure that the marijuana in your system is no longer detectable. Always proceed with caution.

Read moreHow Long Does THC Stay In Your Body?

How to Pass a Marijuana Drug Test


By Robert Bergman,

Because marijuana is not yet treated like other legal drugs, workers need to be constantly worried about whether or not they will be denied employment because they didn’t ‘pass’ a marijuana drug test. This is especially true if you use marijuana for its medicinal purposes. Medical marijuana patients will need to have a prescription that is recognized in the eyes of the law.

Urine drug test

If urine is found to test positive for the presence of a drug, a medical review officer is called in who will decide if a justifiable medical reason exists for the results of the test. If the worker has their prescription for that drug, such as urinecodeine or oxycodone, it is excused and allowed by the company and the law. This normal procedure does not generally apply to medical marijuana, unfortunately.

Read moreHow to Pass a Marijuana Drug Test

Federal Court Strikes Down Mandatory Drug Testing for College Students

In a clear victory for civil rights and common sense, a federal district court has struck down a controversial policy at Linn State University in Missouri which requires all new students to submit to unprovoked drug testing. The court ruled this testing to be “unconstitutional”.urinesample

“Linn State required every incoming student to be tested for drugs, even though many of them would not be engaged in dangerous activities, and the college had no reason to believe any particular student was using drugs”, said Jason Williamson, an attorney for the ACLU, “Any student who refused to submit to the drug test—which is considered a search under the Fourth Amendment—would be denied the opportunity to pursue their education at Linn State.”

Read moreFederal Court Strikes Down Mandatory Drug Testing for College Students