Will CBD Show Up on a Drug Test? (2024)

Cannabidiol (CBD) shouldn’t show up on a drug test, but many CBD products contain a small amount of delta-9-tetrahydrocannabinol (THC). If enough is present, this might show up.

Cannabidiol (CBD) shouldn’t show up on a drug test.

However, many CBD products contain trace amounts of delta-9-tetrahydrocannabinol (THC), marijuana’s main active ingredient.

If enough THC is present, it will show up on a drug test.

This means that in rare cases, using CBD might lead to a positive drug test. It all depends on the product’s quality and composition.

Read on to learn how to avoid a positive drug test result, what to look for in CBD products, and more.

Most CBD products aren’t regulated by the Food and Drug Administration (FDA). As a result, it’s difficult to know what’s in them — even if these products are legal in your state.

Factors such as where the CBD extract comes from and how it’s harvested might make THC contamination more likely. Certain types of CBD are less likely to have THC in them than others.

CBD comes from cannabis, a family of plants. Cannabis plants contain hundreds of naturally occurring compounds, including:

  • cannabinoids
  • terpenes
  • flavonoids

Their chemical composition varies according to the plant strain and variety.

Although marijuana and hemp products are both derived from cannabis plants, they contain different levels of THC.

Marijuana plants typically contain THC in varying concentrations. The THC in marijuana is what produces the “high” associated with smoking or vaping weed.

In contrast, hemp-derived products are legally required to contain less than 0.3 percent THC content.

As a result, hemp-derived CBD is less likely to contain THC than marijuana-derived CBD.

Plant variety isn’t the only factor. Harvesting and refinement techniques can also change which compounds appear in CBD.

CBD extracts are typically labelled as one of the following types.

Full-spectrum CBD

Full-spectrum CBD extracts contain all of the compounds that occur naturally in the plant they were extracted from.

In other words, full-spectrum products include CBD alongside terpenes, flavonoids, and other cannabinoids such as THC.

Full-spectrum CBD products are typically extracted from the marijuana subspecies.

Full-spectrum marijuana-derived CBD oil may contain varying amounts of THC.

Full-spectrum hemp-derived CBD oil, on the other hand, is legally required to contain less than 0.3 percent THC.

Not all manufacturers disclose where their full-spectrum extracts come from, so it can be difficult to assess just how much THC may be present in a given product.

Full-spectrum CBD is widely available. Products range from oils, tinctures, and edibles, to topical creams and serums.

Broad-spectrum CBD

Like full-spectrum CBD products, broad-spectrum CBD products contain additional compounds found in the plant, including terpenes and other cannabinoids.

However, in the case of broad-spectrum CBD, all of the THC is removed.

Because of this, broad-spectrum CBD products are less likely to contain THC than full-spectrum CBD products.

This type of CBD is less widely available. It’s most often sold as an oil.

CBD isolate

CBD isolate is pure CBD. It doesn’t contain additional compounds from the plant it was extracted from.

CBD isolate typically comes from hemp plants. Hemp-based CBD isolates shouldn’t contain THC.

This type of CBD is sometimes sold as a crystalline powder or a small, solid “slab” that can be broken apart and eaten. It’s also available as an oil or tincture.

Drug tests screen for THC or one of its main metabolites, THC-COOH.

According to Mayo Clinic Proceedings from 2017, federal workplace drug testing cut-off values were established to avoid the possibility that trace amounts of THC or THC-COOH would trigger a positive test.

In other words, passing a drug test doesn’t mean that there isn’t any THC or THC-COOH present in your system.

Instead, a negative drug test indicates that the amount of THC or THC-COOH is below the cut-off value.

Different testing methods have different cut-off values and detection windows, as listed below.


Urine testing for cannabis is common, especially in the workplace.

In urine, THC-COOH must be present at a concentration of 50 nanograms per milliliter (ng/mL) to trigger a positive test. (A nanogram is approximately one-billionth of a gram.)

Detection windows vary a lot according to dose and frequency of use. In general, THC metabolites are detectable in urine for approximately 3 to 15 days after use.

But heavier, more frequent cannabis use can lead to longer detection windows — more than 30 days, in some cases.


Blood tests are far less common than urine tests for drug screening, so they’re unlikely to be used for workplace testing. This is because THC is quickly eliminated from the bloodstream.

It’s only detectable in plasma for up to five hours, though THC metabolites are detectable for up to seven days.

Blood tests are most often used to indicate current impairment, for instance, in cases of driving under the influence.

In states where cannabis is legal, a THC blood concentration of 1, 2, or 5 ng/mL suggests impairment. Other states have zero-tolerance policies.


Currently, saliva testing isn’t common, and there are no established cut-off limits for detecting THC in saliva.

A set of 2017 recommendations published in the Journal of Medical Toxicology suggest a cut-off value of 4 ng/mL.

THC is detectable in oral fluids for around 72 hours, but may be detectable for much longer with chronic, heavy use.


Hair testing isn’t common, and there are currently no established cut-off limits for THC metabolites in hair.

Private industry cut-offs include 1 picogram per milligram (pg/mg) of THC-COOH. (A picogram is about one-trillionth of a gram.)

THC metabolites are detectable in hair for up to 90 days.

There are several potential reasons why CBD use might lead to a positive drug test result.


There is potential for cross-contamination during the CBD manufacturing process, even when THC is present only in trace amounts.

Cross-contamination may be more likely for manufacturers preparing products that contain CBD only, THC only, or a combination of the two.

The same is true in stores and at home. If CBD oil is around other substances that contain THC, cross-contamination is always a possibility.

Secondhand exposure to THC

Although it’s unlikely that you’ll receive a positive drug test result after exposure to secondhand marijuana smoke, it’s possible.

Some research suggests that how much THC you absorb through secondhand smoke depends on the potency of the marijuana, as well as the size and ventilation of the area.

Product mislabeling

CBD products aren’t consistently regulated, which means that there typically isn’t a third party testing their actual composition.

A 2017 study from the Netherlands evaluated the accuracy of the labels provided on 84 CBD-only products purchased online. The researchers detected THC in 18 of the products tested.

This suggests that product mislabeling is fairly common in the industry, although more research needs to be done to confirm if this is also true for American CBD products.

In acidic conditions, CBD can turn into THC.

Some sources speculate that this chemical transformation also occurs in the human stomach, an acidic environment.

In particular, a 2016 in-vitro study concluded that simulated gastric fluid can transform CBD into THC.

However, a 2017 review concluded that in-vitro conditions don’t represent the actual conditions in a human stomach, where a similar transformation doesn’t appear to occur.

The researchers in the 2017 review also pointed out that among the reliable clinical studies available, none have reported side effects of CBD similar to those associated with THC.

Some CBD products may be safer than others. If you’re considering using CBD, it’s important to take time to evaluate the products available.

Read the product information

Find out whether the product comes from hemp or marijuana. Next, find out whether the CBD is full-spectrum, broad-spectrum, or pure CBD isolate.

Remember that CBD products that come from marijuana, along with full-spectrum CBD products derived from hemp, are more likely to contain THC.

This information should be very easy to find. If it’s missing from the product description, it might be a sign of a not-so-reliable manufacturer.

Opt for products that list the amount of CBD

It’s a good idea to find out the concentration of CBD per dose.

Remember that it may vary according to whether the product is an oil, tincture, edible, and so on.

In many cases, more concentrated CBD products are more expensive, even though they may appear to be the same size or smaller than other products.

If possible, start with a low-dose product.

Find out where hemp-derived CBD products come from

Hemp quality varies by state. More reputable states, such as Colorado and Oregon, have longstanding hemp industries and rigorous testing guidelines. If information about the hemp isn’t available on the product description, contact the seller.

Do your research

When evaluating the product, you should look for certain terms, such as:

  • USDA-certified organic
  • CO2-extracted
  • solvent-free
  • decarboxylated
  • pesticide- or herbicide-free
  • no additives
  • no preservatives
  • solvent-free
  • lab-tested

However, in many cases it will be difficult to prove that these claims are true. The best way is to look for any available lab test results associated with a given manufacturer.

Avoid products that make health-related claims

Epidiolex, an epilepsy medication, is the only CBD-based product with FDA approval. Epidiolex is only available by prescription.

Other CBD products haven’t undergone FDA testing to assess their safety and effectiveness in treating specific health problems, such as anxiety or headaches.

Therefore, sellers aren’t allowed to make health-related claims about CBD. Those that do are breaking the law.

Routine drug tests don’t screen for CBD. Instead, they typically detect THC or one of its metabolites.

The person ordering the drug test could request to have CBD added to the list of substances being screened for. However, this is unlikely, especially in states where CBD is legal.

CBD shouldn’t show up on a routine drug test.

However, keep in mind that the industry isn’t consistently regulated, and it’s hard to know what you’re getting when you purchase a CBD product.

If you want to avoid THC, ensure that you’re purchasing CBD isolate from a reliable source.

Is CBD legal? The 2018 Farm Bill removed hemp from the legal definition of marijuana in the Controlled Substances Act. This made some hemp-derived CBD products with less than 0.3% THC legal at the federal level. However, CBD products containing more than 0.3% THC still fall under the legal definition of marijuana, making them illegal at the federal level. Some states have legalized CBD, so be sure to check state laws, especially when traveling. Also, keep in mind that the FDA has not approved nonprescription CBD products, and some products may be inaccurately labeled.

Will CBD Show Up on a Drug Test? (2024)


Will CBD Show Up on a Drug Test? ›

The presence of CBD itself won't show up on a drug test. However, the use of certain CBD products could, in theory, result in a positive test if there are low levels of THC present. THC sometimes finds its way into CBD products due to contamination in the manufacturing process.

Will I flunk a drug test if I take CBD? ›

Despite the fact that cannabidiol (CBD) is derived from cannabis—the same plant that marijuana comes from—CBD should not show up on a drug test.

Will vaping CBD show up in a drug test? ›

No, CBD vape oil does not show up on drug tests. Drug tests look for THC and other cannabinoids, but not CBD. Therefore, the amount of CBD vape oil used does not make a difference in the outcome of a drug test.

How do you clear a CBD drug test? ›

Drinking plenty of water helps to flush out the body's systems, while exercising helps to increase the body's metabolic rate and helps to break down the CBD molecules more quickly. Taking a detoxification supplement can help to accelerate the process and can also help to reduce any potential side effects.

How much CBD do I need to fail drug test? ›

A urine drug test detects THC above 50mg/ml, which would require the user to consume more than 2,000mg of CBD product on a regular basis.

What kind of CBD won't show up on a drug test? ›

Broad-spectrum CBD oil is a great choice for those looking for a CBD oil that doesn't show up on drug tests. Broad-spectrum CBD oil contains all of the compounds found in the cannabis plant, except for THC. This means that you will get all of the benefits of CBD, without the risk of failing a drug test.

Does LabCorp test for CBD? ›

The LabCorp CBD/THC ratio test measures CBD and THC metabolites in urine. The CBD/THC ratio is calculated using the sums of the respective metabolites.

Is CBD legal federally? ›

Under federal law, CBD consumers can receive CBD products in the mail across all 50 states, as long as they are hemp-derived and contain less than 0.3% THC. You have many options available to you when shopping for CBD products. You can purchase legal hemp-derived CBD products online, no matter where you live in the US.

Will you test positive for delta 9? ›

The simple answer is yes - delta-9 can show up on a standard drug test. This is because most drug tests are designed to detect THC metabolites in your system. Depending on the type of drug testing used, delta-9 may be detectable for anywhere from several days to several weeks after consumption.

How long does it take to flush out CBD? ›

Since it takes approximately five half-lives to completely eliminate a drug from the human body, it's likely that CBD stays in the system for about 85 hours, or about 3.5 days” says Dr. Johnson-Arbor.

How long is delta-8 detectable in urine? ›

Urine tests highly depend on how often you abuse the substance, for example: Occasional users will test positive for Delta 8 to 3 days after their last use. Moderate users will test positive for Delta 8 between 5 to 7 days after their last use. Daily users will test positive for 10 to 15 days after their last use.

What shows up in a drug urine test? ›

These tests indicate if one or more prescription or illegal drugs are present in urine. These tests detect the presence of drugs such as marijuana, cocaine, opiates, methamphetamine, amphetamines, PCP, benzodiazepine, barbiturates, methadone, tricyclic antidepressants, ecstasy, and oxycodone.

Can an employer fire you for using CBD oil? ›

Yes, an employer could fire you for using CBD oil.

There is a possibility that using CBD oil could lead to you testing positive in any THC test results. If your employer has any rules against THC, this could lead to termination.

How do you flush Delta 8 out of your system? ›

Drinking plenty of water is the best way to flush delta 8 out of your system as quickly as possible. Drinking plenty of water can help to flush substances out of your body, including delta 8. Prioritize staying hydrated.

Is CBD a drug? ›

Since CBD is an approved prescription drug, it can't be legally included in foods or dietary supplements. CBD can only be included in "cosmetic" products. But there are still CBD products on the market that are labeled as dietary supplements.

Will delta 8 test positive? ›

Can Delta 8 Produce a Positive Drug Test Result? In short, the answer is yes. delta-8 will make you fail a drug test. However, because Keystone can differentiate between delta-8 and delta-9, often those who test for delta-8 come up positive for delta-9.

What is an unconfirmed positive drug test? ›

The term Unconfirmed Positive is used to describe those cases where the device result was positive, but the concentration of target drug(s) or metabolites in the urine, as determined by MS, was below the DOT/DHHS confirmation cutoff.

Does labcorp test for delta 8? ›

Use. This test is used to assist in identifying and distinguishing the presence of Delta-8 and Delta-9 THC metabolites in urine.

What does CBD show up as in blood test? ›

The CBC test identifies and counts the 7 types of cells found in the blood, red blood cell, neutrophil, eosinophil, basophil, lymphocyte, monocyte, and platelet. Sickle cell anemia is an inherited blood disease in which the red blood cells produce abnormal pigment (hemoglobin).

Is CBD the same as Marijuanas? ›

Cannabidiol (CBD) is a compound found in marijuana.

CBD is not impairing, meaning it does not cause a “high.” CBD can be derived from hemp or from non-hemp plants. Hemp is defined as any part of the cannabis sativa plant with no more than 0.3% of tetrahydrocannabinol (THC), the mind-altering substance in marijuana.

What states don t allow CBD? ›

Some states allow marijuana-based CBD without medical exemption; other states require a medical exemption. Idaho, Nebraska, and South Dakota are the only states where marijuana-derived CBD is illegal.

Can federal employees use CBD gummies? ›

The Issue for Federal Employees

The use of CBD products—topically or by ingestion—can cause a positive drug test due to the presence of THC. CBP does not consider this a false positive, since it is an actual finding of THC. This can result in disciplinary action, up to and including removal from service.

Will Delta-10 test positive? ›

Short answer: yes, they will. Delta-8 and Delta-10 are derived from hemp and they do contain THC, which will be flagged in most urine drug tests.

Will Delta 9 gummies get me high? ›

Delta 9 THC gummies can absolutely get you high because it's the most well-known psychoactive cannabinoid and the one most responsible for people getting high on cannabis around the world. It can cause feelings of euphoria, relaxation, a sense of happiness, laughing fits, and other effects.

Can I take CBD before a test? ›

Before a test, many high school students rely on energy drinks and caffeine to keep them awake. If you have anxiety, though, these beverages may aggravate your condition. CBD oil is a better option in this case. It helps you stay concentrated throughout a test by improving your cognitive function.

Should I tell my employer I take CBD? ›

CBD, while it will show up on a drug test, is typically not one of the compounds drug tests screen for. Unlike THC, it lacks intoxicating properties and poses no concerns to employers.

Can CBD stop you from getting a job? ›

Employers aren't screening for cannabidiol, but many screen for THC – the psychoactive ingredient in marijuana. And while many CBD products do not contain any THC, some do. This is why it's so important to research CBD distributors and use products that you trust.

Is it OK to use CBD at work? ›

If you are tired of being jittery while at work, you may want to try some CBD products. With the right CBD products, you should have no problem increasing your alertness without the negative effects of caffeine.

Should I take CBD before a job interview? ›

Although you can't completely eliminate the nerves associated with a big job opportunity, taking CBD before an interview can make it more manageable. With the proper dosage and enough time, CBD may help: Promote sleep. Settle your stomach.

Is CBD good for test anxiety? ›

Regulate fear and anxiety.

The amygdala and hippocampus are classic centers in the brain that detect fear and anxiety. Choosing to take CBD oil for test anxiety and other routes of administration, may upregulate these centers by balancing stimulation of the CB1 and CB2 receptors.

Is CBD good for college students? ›

Focus and concentration. CBD has excellent impact on calming the mind, thereby increasing concentration and focus. With a calm mind they can learn, process and retain the learned information better. This can also help students effectively improve their grades as they can focus on their academics.

Does Delta 8 show up on drug tests? ›

Delta-8 THC is a chemical found in cannabis with similar effects to traditional (delta-9) THC. Because delta-8 THC is similar to delta-9 THC, it can make you feel high and is likely to show up on a drug test.

Is CBD still considered a drug? ›

Since CBD is an approved prescription drug, it can't be legally included in foods or dietary supplements. CBD can only be included in "cosmetic" products.


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