how long for cbd oil to leave system

How Long Does Vaped CBD Stay in Your System?

Many people prefer to vape cannabidiol (CBD) because its effects are instant. The lungs are extremely efficient at absorbing small, fat-soluble molecules such as CBD, so it’s able to go straight into your bloodstream and start working right away (1).

For this same reason, vaped CBD is eliminated from your body quicker than other methods. In most cases, it will be cleared out of your body after about 5-6 hours.

But the precise duration can vary quite a bit depending on several factors. Here’s what you need to know to estimate how long CBD from vaping will stay in your system.

Table of Contents

Factors to Keep in Mind

The exact length of time that CBD will stay in your body depends on multiple variables, including the dosage, how often you vape, how much you weigh, and your unique body chemistry and genetics.

CBD Vape Dosage

Like most substances, the more CBD you take, the longer it will stay in your system. It takes your body (especially the liver) some time to process any substance that comes in, so the more CBD you take, the longer it takes.

How Often You Vape CBD

How often you vape also matters. If you only vape CBD occasionally, it has no chance to build up in your body. But if you vape every day, your body can begin to store in your fat tissue (like other cannabinoids), which means it can stay around for longer (2 ).

Body Chemistry

Another factor that shouldn’t be overlooked is that everyone’s body is unique. For example, your body’s metabolism might be quicker than normal, which means it can process CBD from vape juice quicker (3).

Age can be a factor too since our metabolism slows down as we get older (4).

The genes related to your endocannabinoid system (ECS) can play a role as well since CBD produces many of its effects by interacting with this system.

For example, there are dozens of known variations of the gene for FAAH, the enzyme that breaks down one of the main endocannabinoids made by our bodies (5).

How You Take CBD Matters

The way you consume CBD also has a significant impact on how it’s processed, and by extent, how long it will stay in your system.

Unfortunately, most of the scientific studies of CBD use its oral (capsules/gummies) or sublingual (oil) method of administration rather than inhalation (vaping and smoking).

For this reason, it’s difficult to say precisely how long the CBD from vaping will stay in your system.

For example, we know that CBD and other cannabinoids have low absorption when you ingest them (6 ), which is why it can take longer for the CBD from oral products such as gummies and other edibles to clear out of your body.

What Does the Research Say?

In one study of cannabis cigarettes which contained a small amount (0.25%) of CBD, cannabidiol levels were no longer detectable an hour after smoking (7).

Also, a study using a nebulizer, a device that creates an inhalable mist that’s somewhat similar to the vapor produced by a vaporizer, reported that CBD’s half-life (the amount of time it takes for the concentration of a substance you took to be reduced by 50%) was 1.1 hours.

Considering that about five half-lives are enough to almost completely eliminate a drug (8), we can estimate that CBD inhaled from vaping will stay in your system for about 5-6 hours. However, this situation assumes that you only used CBD once.

Another comprehensive review paper concluded that CBD’s half-life can vary anywhere from an hour to 5 days depending on the way and how often you take CBD (9).

One thing we can say for certain is that if you use CBD regularly, it will take longer to clear out from your body. For example, in one 1991 study, it took more than a week for CBD to be undetectable in the blood of people who took large (700 mg) doses daily for six weeks (10).

Still, since inhaled CBD is cleared out of the body faster than oral preparations, we can likely lower this number down to several days for people who vape every day.

The Bottom Line

There isn’t enough research to give you a precise answer to how long vaped CBD will stay in your system.

We can estimate that CBD will clear out of your body about 5-6 hours after vaping if you only vape once. However, if you vape regularly it may take several days or even a week for it to leave your system completely.

Whatever the case, the great thing about CBD is that it’s non-intoxicating and doesn’t show up on drug tests, so you don’t need to worry.

The only thing to be aware of is that full-spectrum CBD products contain small amounts of THC (0.3% or less), which could potentially show up on a drug test.

If you’re worried about drug tests, it’s better to use vape products made with pure CBD isolate, which shouldn’t contain any THC. You should also check the product’s third-party test reports to verify that there’s no THC.


Gleb is a freelance writer from Vancouver, Canada specializing in CBD and cannabis. He’s read thousands of studies on CBD and other supplements, helping him translate complex science into plain language. Gleb has tried and reviewed dozens of CBD brands and products, written third-party testing reports, and knows the CBD industry inside and out. When not writing, he likes to kickbox, travel, and tell everyone how awesome intermittent fasting is.

How Long Does CBD Stay In Your System?

There are many great, valid reasons to want to add CBD to your life, and with skyrocketing popularity, it’s easy to understand why more and more people are asking questions about this seemingly commonplace cannabinoid. One such question that many want to know is — how long does CBD stay in your system? The answer to this varies depending on a few factors; quantity and frequency of use, your unique biological makeup, and the method of consumption, and even your diet can affect how long CBD stays in your body. Learn more below.

What Is CBD?

First, a quick recap. Cannabidiol (CBD) is a cannabinoid naturally found in the cannabis plant that is often used for reported health benefits such as reducing inflammation, pain, nausea, and even in the treatment of seizure disorders with positive results. It can be taken in many forms, such as oils, topicals, edibles, vaping, and smoking. Unlike its sister cannabinoid, THC, cannabidiol is non-psychoactive and will not make users feel high or intoxicated.

How Long Does CBD Last In Your Body?

A 2018 review of prior CBD research reported that the estimated half-life of CBD when consumed daily was around 2-5 days. Effects, on the other hand, can generally be expected to last anywhere between 2-6 hours. That said, as mentioned above there are several factors at play that may cause your results to vary.

  1. Quantity

The amount of CBD you use will affect how long it lingers. Higher doses give your body more to process, and thus it will take longer for it to fully move through your system.

  1. Frequency

Similarly, how often you use CBD will determine its longevity in your body. Cannabidiol can build up in the body over time with regular use, so using CBD often will also slow down your body’s processing time, and leave it in your system for longer.

  1. Your Diet

Like most things we consume, how fast our body can process it depends on how busy it is processing other things. When taken on an empty stomach, CBD can metabolize much faster than on a full stomach, and thus pass through at a quicker rate.

  1. Your Body

Speaking of metabolism, you may be aware that everyone’s digestive system is different! One person may metabolize CBD very quickly, while another may not. Other factors that play a role here are your body mass index and even water content.

  1. Method of Use

There are many great CBD products, and the method of delivery can affect the amount of time it sticks around. For example, when you vape CBD the effects are felt quickly, it’s processed quickly, and it tends to leave the body more quickly as well.

CBD canna oils on the other hand are processed by the body’s bloodstream and can hang around longer, much like CBD topicals which typically have a longer duration as well.

CBD edibles meanwhile can be slightly unpredictable, as metabolism really comes into play here. Some may find they hit quickly and don’t take long to leave your system, while others may not feel the effects for some time.

How Long Do The Effects Last?

When it comes to the onset of the desired effects of CBD, methods such as vaping and oils are felt most quickly, generally around 15 minutes or so, while topicals and edibles take longer to be felt — approximately 1-2 hours.

Will CBD Show Up On A Drug Test?

Most drug tests are not searching for other compounds, and thus CBD won’t show up on a drug test. The Substance Abuse and Mental Health Services (SAMHSA) guidelines include detection for THC but not CBD, and are followed by most employers. However, depending on the cannabidiol product you are using, you may still be consuming tetrahydrocannabinol (THC).

A full-spectrum CBD product contains cannabidiol as well as all naturally occurring compounds in the cannabis plant. This means that THC and even other cannabinoids such as cannabinol (CBN) and more can be present. While some studies suggest that these full-spectrum products are more effective due to the cannabinoids enhancing one another, for those who are concerned about drug test results, you will want to avoid anything that could possibly contain THC.

Instead, you will want to opt for a broad-spectrum product refined to exclude THC, or a pure CBD isolate with no other cannabinoids besides cannabidiol. Regardless of what you’re looking for, make sure to choose products that can provide certificates of analysis and have been tested for content and quality by third-party manufacturers.