Home » Will CBD Make Me Fail a Drug Test?

Drug tests are common practice in a lot of areas. Police officers in many cities and states often have to submit to drug tests. Employers in the private sector might also request them as well, either for safety reasons or just as a matter of organizational ethics. If you happen to work for a company or public sector department that does routine screenings, failing a test could put your career in jeopardy.

These tests are also very common in the criminal justice system as a condition for parole or probation. Here, however, the stakes are even higher. Detecting THC or any other illicit substance in your system is a one-way ticket back to jail.

The only thing that could make either of these scenarios worse is if you fail a drug test due to a false positive. Imagine losing your job or even your freedom just because something in your system skewed the result.  

Considering the importance of remaining drug-free in such instances, it’s understandable that you might feel a bit nervous about using CBD. After all, CBD does come from cannabis – the genus to which marijuana (cannabis sativa) belongs.

So will CBD make you fail a drug test? To answer this question, we’ll need to look at how CBD is obtained, how drug tests work and also cover some preventative steps that you can take.

What is a Drug Test?

In this case, the name says it all – it’s a test for drugs, plain and simple. But how do common drug tests work and how are they conducted?

Urine Tests

We hear about urine drug tests a lot, especially when it comes to professional athletes. The way a urine test works is fairly simple.

Certain drugs can be detected as your body eliminates them through the urine. These types of tests are effective at finding a variety of illicit drugs, including marijuana.

The tests vary in complexity. Consequently, some are more reliable and efficient than others.

Blood Tests

Blood tests use blood samples to detect the presence of a variety of different drugs, like amphetamines, cocaine, LSD, PCP and barbiturates, to name a few. Although they are capable of detecting marijuana use, they’re not very reliable in this respect. THC – the psychoactive ingredient in marijuana – only lasts about six hours in the bloodstream for most users. People who use it heavily, however, could test positive for up to 24 hours.

Blood tests are the most accurate of them all, according to Addiction Resource, a substance abuse organization; however, they’re the least preferred because they cost more than any other method and are “the most invasive of all the drug tests.” They also require high-tech medical equipment and trained lab techs.

Saliva Tests

Saliva tests are becoming very common for a variety of reasons, and are effective at detecting marijuana use.

One big advantage is that saliva tests are very difficult to cheat. Anyone can slip a clean urine sample into the container from behind the privacy of a bathroom door – not so much with saliva.

Using saliva also allows for much faster detection, since testers don’t have to wait for your body to pass the drug through urine.

These types of tests are also non-invasive and allow for quick collection and processing of samples. This makes them particularly handy if law enforcement wants to draw a clear connection between impairment and the presence of certain drugs in your system.

Hair Follicle Tests

Hair tests can detect the presence of marijuana (and other illicit substances) 90 days or even further in the past. It relies on trace amounts of the drug being collected in the hair follicle, which can then be easily detected. 

It’s important to note, however, that these tests generate more positive results than any other. This is due to the wide timeframe that other tests simply don’t cover.

While this might be useful for pre-screening in employment or other preventative purposes, it takes time for the drug in question to become absorbed by the follicle, making it essentially ineffective for detecting recent drug use.

Understanding the Source of CBD Oil

When it comes to marijuana testing, THC is the culprit that gives you away. Drug tests are testing for the presence of THC. This is where the fundamental difference lies – and why CBD shouldn’t create a positive result.

The oil we advocate for is extracted from the hemp plant, a member of the cannabis genus that contains only minute traces of THC. The level is so low, in fact, that CBD hemp oil isn’t treated as a controlled substance.

Regular cannabis oil, on the other hand, comes from the cannabis sativa (marijuana) plant and is guaranteed to contain enough THC to trigger a test. That’s why it’s only available by prescription from a licensed medical marijuana grower in most places.

Will CBD Hemp Oil Cause a Failed Drug Test (I.e. a False Positive)?

On the surface, you’d think that something with so little THC wouldn’t show up on a drug test. And for the most part, this is true; however, there can be oddities and exceptions.

One reason why people using CBD hemp oil fail drug tests is that the product they bought wasn’t exactly sold as advertised. Remember, hemp does still contain a minute amount of THC. It’s possible that the plant used in their particular brand had a bit more THC than intended. Some manufacturers might not care about compliance in this respect – a serious legal gamble.

But according to a post by the CBD research and development company, Endoca, there’s another, much more controllable reason why CBD hemp oil might cause you to fail a drug test. In Endoca’s words, “The answer to the question of whether you will test positive if you use a high-quality [emphasis added], low THC CBD hemp oil is, in a nutshell, Not unless you use way too much of it.”

In short, if you use CBD hemp oil properly, then there’s no reason why you should fail a drug test.


Clearly, the odds are in your favor if you’re concerned about failing a drug test, but that doesn’t mean you shouldn’t take precautions.

Make sure you evaluate your CBD hemp oil source. Just because a website has pretty pictures and nice testimonials doesn’t mean they’re not peddling a substandard product (hence Endoca’s use of the term “high-quality” when referring to proper hemp oil).

When it comes to professional or legal matters, it’s critical to have your bases covered. You could advise your employer or parole/probation officer, for instance, of your CBD use. Since this product is a supplement, it’s no different than a multivitamins in the eyes of the law. But there’s no guarantee that this will be satisfactory. Your best bet is to let the powers that be know ahead of time and get their permission first. A doctor’s note may be helpful to back you up.

Concluding Remarks

Considering the growing anecdotal and scientific evidence for CBD as a therapeutic supplement, it would be a shame if you lost your job or went to jail just for trying to deal with things like pain or anxiety. Judging by what we know so far, however, you don’t have anything to worry about. Just use the product as directed and make sure the oil you buy is top-notch.


In this article, we covered the following information:

– Common drug screening methods include urine, blood, saliva and hair tests.

– The foolproof way to avoid failing a drug screening is to use ZERO THC

– Tests vary in terms of accuracy, cost, application and timescale.

– When searching for marijuana use, testers look for THC in your system, not CBD.

– CBD hemp oil contains little THC but any product which contains THC carries the risk of coming up on a drug screening.

– Some reasons why CBD hemp oil users might fail a test are:

1. The CBD product is mislabeled or improperly processed.
2. The user is taking a high dosage of CBD hemp oil.

– Be careful and think ahead if your employer or other organization requires regular drug testing.

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