How Long Does CBD Oil Stay In Saliva


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There are a number of variables that effect how long cannabis can stay in your system. Learn about methods of drug testing and how that impacts the results. Several factors determine how long CBD stays in your system. Learn how to predict the effects of CBD, how long it will show up on drug tests and more. CBD typically remains in your body for two to five days, though this depends on certain factors. Learn all about how long CBD stays in your system here.

How long does cannabis stay in your system?

Depending on consumption method, frequency of use and other variables, cannabis can stay in your system up to 90 days. This article covers the types of tests and explains the research behind cannabis metabolisation.

Tom Arkell
Tom Brown
  1. There are many factors that determine how long cannabis can be found in your system.
  2. The saliva or oral fluid test looks for THC and is the test used in Australia during roadside tests.
  3. Saliva tests are known to provide false positives between 5%-10% of the time.

In this short video, Tom Arkell from the Lambert Initiative for Cannabinoid Therapeutics explains how long cannabis stays in your system.

Cannabis/Marijuana in your system

The question of, ‘how long does cannabis stay in your system?’ is one of the most popular cannabis questions in Australia. Upon hearing that, many people think, “That a stoner question,” when in fact it’s not.

The laws regarding cannabis and driving in Australia are outdated and don’t actually accomplish the goals that drug driving regulations are meant to achieve. Cannabis or marijuana, whatever you choose to call it, is actually similar to alcohol in this way. Just because an individual has THC in their system, it does not mean that the individual is impaired.

Driving with any THC in your system in Australia is illegal. So, it’s important that you understand how long cannabis stays in your system to protect you from being wrongfully accused of driving while impaired.

If you’re reading this article because you’re concerned about drug testing at work, you may want to check out our guide to medical cannabis and employee rights.

In this article, you’ll learn everything you need to know about how long cannabis, mainly THC, stays in your system for. If you’d like to jump to a specific section here’s what will be covered:

How long does cannabis stay in your system?

Some studies suggest that cannabis can be found in your system for up to 90 days.

However, there isn’t really a definitive answer to this question as it depends on a number of individual variables and external factors including the type of test being used to screen for the drug.

Let’s look more closely at some of those factors.

Factors that impact cannabis in your system

How long cannabis stays in your system differs for each person due to a number of factors. The things that can impact the duration of cannabis in your system are:

  • Body fat percentage
  • How often you consume cannabis
  • How much cannabis you consume
  • how much you exercise
  • The type and sensitivity of the drug test.

THC is fat soluble and can build up in your body fat. If you consume cannabis regularly, you may have THC metabolites in your system for an extended period. The more body fat you have the more potential for THC to be stored in your system.

Interestingly enough, one study shows that exercise can actually increase the amount of THC in your plasma (one part of your blood).

The rest of the factors are actually quite logical. The more regularly you consume cannabis the more likely it is to stay in your system longer. The amount of cannabis also impacts the concentration of cannabinoids in your system.

For the rest of the article we’ll focus on the types of tests and cannabis drug test detection times.

Cannabis drug tests and detection times

The type of drug test you take will have an impact on how long cannabis can be found in your system. Even the calibration of the drug test being taken matters. We’ve listed the standard test below in the shortest to longest amount of time cannabis can be found. It’s also important to note that saliva can only detect THC and not CBD. So, when explaining how long ingested THC stays in your system, it’s more of an estimate than actual fact.

Saliva (Method for cannabis roadside / drug driving test)

A mouth swab or oral drug test for cannabis is the method that Australian police use to test for driving impairment.

How long does cannabis stay in your saliva?

Most research shows that cannabis can be detected in your saliva for up to 24 hours after use, however, a few tests have shown up after 72 hours of use. For chronic users, this could be longer, and smoking is more likely to show up longer than edibles.

In a study conducted at the Lambert Initiative for Cannabinoid Therapeutics in Australia, the team found that most people tested negative three hours after consumption. The group tested was given 13.75 milligrams of vaporised THC flower.

“THC only gets into saliva in the first place due to contamination of the oral cavity when you consume cannabis. So, it’s only when you use cannabis by smoking, vaporisation, eating or via any other way that it comes into direct contact with your mouth that you’ll actually end up with THC in your saliva.”

Tom Arkell, The Lambert Initiative For Cannabinoid Therapeutics

Can cannabis in pill form be detected by a saliva drug test?

Professor Ian McGregor was quoted saying, “If you take it in a capsule, it will bypass your saliva.”

So, if you have been prescribed cannabis in pill form, you really need to be careful to make sure that you’ve waited a safe period of time before driving.

However, research has consistently shown different results. The general rule of thumb for intermittent consumers is that cannabis can be detected in your saliva for between 24 and 72 hours after use. For chronic consumers or medical patients one study has shown detection of up to 8 days.

These are guides, not exact science. The time could be longer and smoking is more likely to show up longer than edibles.

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How Long Does CBD Stay in Your System?

CBD can remain detectable in your system anywhere from 10 hours to 25 days depending on whether you smoke it or injest it and how often you use it.

Cannabidiol (CBD) is a popular chemical compound capable of exerting positive effects on users over time. Yet not everybody experiences the same benefits with CBD use. One reason for this discrepancy could be that people metabolize the chemicals differently. This raises an important question: How long does CBD stay in your system?

Table of Contents

Factors That Influence How Long CBD Stays in Your System

Several factors determine how long CBD stays in your system. The first one is the quantity of CBD. The more CBD you take, the longer you’ll experience the benefits, with heavy doses lingering for the better part of a day.

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Quality of CBD matters, too. You might take 100 mg of CBD and feel next to nothing if it’s low quality. Pure CBD stays in your system longer than products with fillers and additives. However, there should be no difference between the duration of full-spectrum CBD and that of broad-spectrum CBD.

Your frequency of use also influences how long CBD remains in your system. If you are taking CBD every day, it can cause cannabidiol to accumulate in your body. That’s why you may need to take CBD for a week to begin to feel the desired effects since small doses clear your bloodstream rapidly.

Your body type and metabolism dictate how fast CBD effects will occur and how long they will remain in your body. For instance, people with a fast metabolism can process cannabis products within minutes, while others may take hours. CBD will also leave your system quickly if you have a low body mass index and high-water content.

The food you eat before taking CBD impacts how the compound reacts in your body. If you eat CBD on an empty stomach, it’s the first thing your metabolism will break down. However, if you have a big meal beforehand, it will slow your metabolism and digestion when processing CBD.

Finally, your method of consumption when you take CBD makes a difference in how soon you will feel the effects of CBD and how long it will last. Research shows that vaping provides almost immediate benefits because the cannabidiol goes directly into your lungs and then your bloodstream. If you use a cream, lotion, or edible, your metabolism has to break down the product before you feel the effects, which may take hours.

How Long Do the Effects of CBD Oil Last?

As we mentioned above, several factors dictate how you may experience CBD. For example, a short, thin man using CBD isolate for the first time will experience pain relief for longer than a large man that uses it habitually. As a rule of thumb, CBD oil lasts for four to six hours long, though a heavy dose may last 24 hours.

You will find three popular methods of CBD consumption: sublingual, inhalation, and topical. Sublingual involves placing the CBD product under your tongue. The cannabidiol will take effect in two to four minutes since the CBD travels through the mucous membranes in the mouth and into the bloodstream, bypassing the digestive system entirely.

Inhalation allows people to ingest CBD through vaporized particles. A joint or vape pen turns the cannabidiol into fine specks that individuals can inhale. Once the CBD enters the lungs, the body absorbs it rapidly, making vaping ideal for immediate pain relief.

Topicals take the longest amount of time to work, ranging from 15 minutes to two hours. The lotion, cream, or salve has to dissolve into the skin before the metabolism can process it. The slow infusion means that topicals have the most extensive detectable window of any method of consumption.

Does CBD Show Up on a Drug Test?

According to the 2018 U.S. Farm Bill, any hemp-derived product must contain less than 0.3% tetrahydrocannabinol (THC). That means that both CBD and minute amounts of THC are present in products like full-spectrum hemp-derived CBD.

That trace amount of THC can be a valid concern if you want to pass a drug test. On the other hand, if you use a broad-spectrum CBD, by definition, it should have no THC. However, you only have the word of the company that provides it that all THC has been removed unless you personally have it tested.

This distinction matters because most companies test for THC, not CBD. THC, the compound responsible for psychoactive effects, is the main component of the marijuana form of cannabis but only a very minuscule part of hemp-derived CBD. While CBD and hemp products are legal in some form in most states, the same does not apply to cannabis containing more than 0.3% THC, known as marijuana.

Expect to have small amounts of THC stay in your system and show up on drug tests unless you consume broad-spectrum hemp CBD or CBD isolate. The chances of a positive drug test go up with routine ingestion of CBD-containing THC. That’s because your fat cells may store the THC for a few days after ingestion.

Just because you don’t feel the effects of the THC in hemp-derived CBD doesn’t mean it’s not detectable in urine, blood, or saliva drug tests. The half-life of CBD ranges between 18 and 32 hours. The half-life refers to the point at which the CBD products have 50% of the original dose’s potency.

The Half-Life of CBD

Every drug that enters your system gradually leaves it. CBD is no exception. Your body will break down the cannabidiol in your digestive system and liver before getting rid of it through urine, hair, and sweat.

A study from Pharmacology, Biochemistry, and Behavior looked at CBD half-lives on patients with Huntington’s disease. Each person received a 700 mg dose of CBD each day for six weeks. Researchers found that potency dropped 1.5 ng/mL a week after the last dose.

So what do these results tell us about the half-life of CBD? The study found that even a substantial dose of CBD is undetectable after a week. The patients with Huntington’s disease took 700 mg of CBD per day when most people only use 100 mg of CBD or less.

How long CBD stays in the body depends on how frequently someone uses it. A person that uses CBD more regularly may have it stay in their system for three or four days, while a first-timer may only have it detectable for two days. Researchers have determined that whether a user is male or female does not influence CBD’s half-life.

Let’s use an example to illustrate how long it takes to flush CBD from your system. If you consume 100 mg of CBD that has a half-life of one day, you can expect to have the maximum concentration of CBD (100 mg) in your body after one hour.

The CBD concentration in your body will drop 50% (to 50 mg) after 24 hours. This point marks the first half-life. The CBD concentration will exponentially decline from here until it disappears.

The next half-life occurs two days after your initial dose. The concentration has shrunk to 25 mg and will drop to 12.5 mg and 6.25 mg in the subsequent daily measurements. At this point, the CBD should be undetectable.

Types of Drug Tests for CBD and THC

There are four main types of drug tests that are used to detect CBD and THC. Each type tests a different part of the body, which results in varied results.

Urine Drug Test

CBD remains in urine for 3 to 5 days. As long as you don’t use CBD for at least 5 days leading up to your test, you should be fine. Your metabolism can process and excrete hemp-derived CBD relatively quickly so that it’s no longer detectable.

THC metabolites, however, linger in urine for up to 15 days. Metabolites are a byproduct of the body metabolizing a compound and turning it into a different substance. These compounds stay in your system longer than the parent drug, which is why testers look for them to find evidence of drug use.

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Urine tests are one of the most common and popular ways to screen for cannabis. There’s a good chance you’ll encounter one at your next screening.

If you have used full-spectrum CBD recently, you can help it leave your system faster through vigorous exercise and fluid consumption.

Hair Drug Test

The THC metabolites from CBD products stay in your system for up to 90 days. The compounds that pass through your bloodstream eventually become part of your hair. It takes at least 5 days before CBD and THC are detectable in your follicles.

The good news is that hair drug tests are rare. Most employers and organizations rely on saliva or urine tests because they’re faster and cheaper. There’s also the risk of prescribed medications for your hair, leading to false positives.

Saliva Drug Test

Research on how long CBD stays in the saliva isn’t as robust as in other areas. If you consume CBD oil, expect the dose to last in your oral fluids for up to three days. The duration may be longer depending on your method and frequency of use.

Once you consume the CBD oil, it will appear on the saliva test within minutes. Fortunately, few companies use this method to look for THC or hemp-derived CBD in the body. States that permit cannabis allow people to have up to four nanograms of CBD per milliliter in their saliva.

Blood Drug Test

Blood tests are far less prevalent than urine or saliva-based ones. One reason is that they’re not as reliable for detecting CBD or THC. THC is only detectable in the bloodstream for up to five hours, while CBD stays in your blood for up to a week.

Blood tests work better to determine if someone is currently impaired, which is why police officers might take a blood sample following a DUI charge. If you live in a state where cannabis is legal, you can have up to five nanograms of THC per milliliter of blood.

How to Detox

We’ve answered the question, “How long does CBD stay in your system?” Now, it’s time to find solutions to speed up the excretion of CBD, THC, and other cannabinoids. The process can increase how fast your body metabolizes CBD and also lower the chances of a positive test, even if you ingested CBD within 24 hours of your screening.

The first step is to stop taking any product that contains THC. That means going cold turkey. Lowering your frequency of use to zero ensures that no new CBD or THC metabolites will appear in your system before the test.

Step two is to hit the gym. Vigorous exercise speeds up your metabolism, forcing your body to sweat and break down fat cells for energy. Research suggests that 45 minutes of intense aerobic exercise can increase your metabolic rate and may accelerate CBD’s exit from the body.

Don’t forget to drink plenty of water and eat healthy, too. The body needs water to cleanse your system and expel toxins. A diet full of fats, sugars, and processed foods makes it more challenging for your metabolism to process the CBD out of your system.

Using CBD While Breastfeeding

The U.S. Food and Drug Administration recommends that women who are pregnant or breastfeeding not use CBD. Research on CBD’s effects on children remains in its infancy, so the FDA advises a cautious approach.

Researchers do know that CBD can pass from mother to child through breast milk. CBD is a fat-soluble compound, meaning that it gravitates towards fatty compounds as a carrier. A CBD product may also have THC, which could negatively affect the breastfed child.

Important Questions

How long does hemp or hemp oil stay in your system?

When people ask, “how long does pure CBD oil stay in your system?” They are usually talking about ingesting CBD as an oil or tincture. When taken in this form, the CBD will take longer to leave the system.

If you are a heavy user, it could take up to 25 days, but 10-14 days is more common.

How long does CBD stay in your blood?

CBD can stay in your blood anywhere from 2-25 days after consumption. Your method of consumption, frequency of use, and BMI will all affect how quickly it leaves your body.

How long does CBD stay in your system for a saliva test?

CBD is detectable in saliva for around 72 hours after use.

How long does it take for CBD to get out of your system?

It takes anywhere from 2-25 days for CBD to completely get out of your system. It will leave more quickly for people that only use it once and have a low body fat percentage.

How to get rid of CBD oil in your system?

To clear your system of CBD, you need to do several things. Your body will eliminate CBD naturally in 2-25 days, but with some help, it can happen sooner. CBD is a fatty molecule, so it loves the fat in your body. Pushing it out of the fat with exercise and lots of water helps the body to eliminate it. Also, getting a lot of fiber in your diet can aid the process further.

How long does a CBD gummy stay in your system?

Like CBD oil, CBD gummies stay in your system longer than CBD that is smoked or vaped. If you are a heavy user, it could stay in your system up to 25 days, but 10-14 days is more common.

How long does CBD stay in your hair follicles and hair?

While a hair test for CBD is extremely uncommon, it is possible for CBD to be detected in the hair up to 90 days after use.

How long does CBD stay in your system when smoked?

While smoked CBD can be metabolized faster, it’s best to assume that it takes 2-25 days for it to completely leave the body. It will leave more quickly for people that only use it once and have a low body fat percentage.

How long does CBD oil stay in your system for a urine drug test?

When people ask, “How long is CBD detectable in urine?” they are usually concerned about a drug test. It’s very rare for CBD to be part of a drug test. THC, the other major chemical in cannabis and hemp is what’s commonly tested for. Even legal CBD products can have .3% THC in them. This could be enough to trigger a positive on drug test. If you are at all concerned, it’s best to not consume any CBD products 25 days before a test.

The Bottom Line

One of the most frequently asked questions about CBD oil and CBD products is “How long does CBD stay in your system?” The answer depends on several factors, including how much you use, your body weight, metabolism, and consumption method.

While most drug tests look for THC and not CBD, your CBD products may contain trace amounts of THC that lead to a failed drug test. While CBD has a half-life of 18 to 32 hours, it can stay in your system for several days.

Here’s the bottom line: You’re unlikely to fail a drug test because of CBD alone in isolate form. Combining THC and CBD in full-spectrum form is a different story. If you want to eliminate the chances of a positive drug test, you can use CBD isolate or no CBD product at all.

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How long does CBD stay in your system?

CBD (short for cannabidiol) has taken the wellness world by storm. Potentially offering benefits like reduced stress , improved sleep quality and better moods , the compound’s popularity keeps growing.

However, while many have started their CBD journey without a second thought, others are put off by fears around how long it will stay in their system, something that could pose issues when it comes to things like drug tests. After all, CBD comes from the hemp plant, which can naturally contain THC, the psychoactive compound that itself is detectable in your system for up to 30 days.

That said, CBD products sold in the UK shouldn’t have THC in them, and CBD itself doesn’t show up on a drug test. CBD can stay in your system for two to five days, however, this is dependent on several factors that we’ll explore in this guide.

Which factors affect how long CBD stays in your system?

While two to five days is the typical range for how long CBD stays in your system, the durations can be impacted by the following aspects:

The dosage

Like with most substances, the higher the dosage of CBD you take, the longer it will stay in your system. Here at TRIP, we recommend taking 15 to 30mg a day at first, before increasing in increments of 5mg each week after the first seven days. For reference, one full dropper of our original CBD oil contains 20mg CBD, while there’s 66mg CBD in the strong version.

The frequency of consumption

How often you take CBD will also impact the time it stays in your system. The compound builds up in your body over time if taken regularly, meaning, the more you take CBD, the longer it will stay there. If you only use it from time-to-time, however, it’ll clear your system pretty quickly.

Your body

No two people are the same, and our different body types mean that CBD will impact people in different ways. Aspects like your body mass index, water content and metabolism are just a few of the things that will affect how long CBD stays in your system. For example, the faster your metabolism, the quicker it will pass through.

Your diet

The food you eat, how much you eat, and when you eat can all impact how long CBD stays in your system. Say you consume CBD on an empty stomach, it will get metabolised and eliminated quicker than if you had it in a full stomach, which would slow its digestion.

The method of use

There are numerous ways to take CBD, from oils and drinks , to vaping and edibles, and which method you choose will again affect how long CBD remains in your body. For example, when vaping CBD, it enters your lungs and takes effect quickly, meaning it won’t stay in your system too long. Whereas, if you ate a CBD edible, you’re relying on your digestive system to metabolise it, which can take some time.

How long does it take for CBD to work?

For CBD to work, it must be able to reach the relevant receptors in the body, which is typically achieved through absorption into the bloodstream. Most people take it via CBD oil, which can take between 15 and 60 minutes to absorb. Again, aspects like weight and genetics impact this and it can take up to an hour for CBD to start working overall.

That said, some methods are much quicker — for example, CBD can be absorbed into the bloodstream in just three minutes by vaping it.

For more information on how long CBD takes to work, check out our guide to the topic .

How long do the effects of CBD last?

Again, how long CBD’s effects last depends on aspects like the dosage, your body and the method of use. As a general rule of thumb though, you should feel the effects of CBD for between two to six hours.

Does CBD show up in drug tests?

Even if you have lots of CBD in your system, it shouldn’t show up on a drug test . However, the issue with taking some CBD products is that they may contain THC, which will show up. Some products have traces of the psychoactive compound, so it’s important to be able to differentiate between the different types of CBD products so that you can avoid the risk of accidentally consuming THC. The three main types are:

  • Full spectrum CBD – These products include all of the naturally occurring compounds from the plant they’re extracted from, including THC.
  • Broad spectrum CBD – Broad spectrum CBD products are similar to full spectrum types, but go through a process to remove the THC. However, trace amounts may still be identifiable in a drug test.
  • CBD isolate – These products contain CBD only.

It’s a good idea to avoid full or broad spectrum CBD products and stick with CBD isolate products if you don’t want to risk testing positive for THC. Here at TRIP, we ensure the purity of our CBD products with third party lab testing, so there’s no possibility that you’ll fail a drug test after consuming them.

How long is CBD detectable in urine?

Research on how long CBD stays in a person’s urine is limited. However, one study from 2016 found that subjects tested positive for CBD metabolites within two hours of administration, but flushed it out of their bodies within 24 hours.

How long does CBD stay in your blood?

While not as common as urine tests, blood tests can be used to detect THC metabolites from CBD oil. However, THC and CBD are very quickly eliminated from the bloodstream, which is why urine tests are the preferred method of testing. Overall, THC and CBD are only detectable in your blood for up to five hours after you take them, though their metabolites can be present for up to a week.

How long does CBD stay in your saliva?

Analysing saliva to detect CBD is rare, meaning there isn’t any information out there on how long it stays in your body this way. However, if the CBD product you take contains enough THC for it to be detectable, the psychoactive compound can be found in saliva for up to 72 hours.


In order to ensure you don’t mistakenly consume THC when using CBD, it’s recommended to always buy CBD products from reputable, trusted brands. Be sure to check that the seller you choose is following the necessary regulations and has a COA (Certificate of Analysis) that confirms what they’re advertising is legitimate.

Here at TRIP, we create our CBD products in line with UK and EU legislation, with each and every one third-party lab tested to ensure they don’t contain THC. Check out all of our products here , and don’t hesitate to drop us a text @ +4478 6212 6624 if you have any questions for the TRIP team.

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