CBD Oil Drug Test: Will It Show Positive Result On Marijuana Screening

Can CBD affect a drug test? What do you need to know about CBD and drug test?

CBD is very popular due to the wide range of health benefits it offers. It is commonly used to ease anxiety, depression and stress. Many also turn to this for chronic pain, sleep disorder, inflammation, arthritis, seizures, ADHD and more.

However, some are reluctant to take this because they fear that it might show up on their drug test. A number of users confessed that taking CBD can show a “false positive” on a drug test, thus, the need for a follow-up test for a conclusive result.

If you are wondering on CBD oil’s effects on a drug test result, then you are on the right page. I’ll be tackling this subject in details in this article. Are you ready? Let’s get started!

Will CBD Show Up in a Drug Test?

There are different opinions when it comes to the effects of CBD in a drug test. Others claim that it won’t affect, but some say that it does.

According to Vice, it’s unlikely for CBD to show up in a drug test. When you take a drug test for employment, chances are they will be screening for cannabis but that actually means that they are looking for the presence of THC or THC metabolites – not really CBD.

Technically, CBD is a chemical and if you ingest it, your body will metabolize it, so it can be detected. However, the average drug test is not designed to pick up CBD or any other compounds found in cannabis other than THC, says Brenda Gannon, a toxicologist and laboratory director at Steep Hill Arkansas.

She added that because CBD is chemically distinct from THC, it is unlikely that pure CBD would be detected in these types of drug tests. However, hemp-based CBD products often contain trace amounts of THC because some researchers believe that a tiny bit of THC enhances the effects of CBD. The presence of THC in the results is what makes you fail the drug test.

How CBD Oil Affects a Drug Test

CBD is one of the many active compounds present in the cannabis plant. Unlike THC, CBD doesn’t cause a person to get high.

Cannabis is the umbrella term describing hemp and marijuana plants, but there’s a huge difference between the two.

Hemp is nearly void of THC. A cannabis strain must contain less than .3% THC to be classified as hemp, otherwise, it’s marijuana. Hemp can be legally sold as various products.

🌿 CBD can affect a drug test because it can show false positive in the test results due to the traces of THC in your body. When the amount of THC in your body is more than the cut off percentage, it will definitely show in the results and it would appear as if you are using marijuana.

After taking a serving of CBD oil, you have an 11-23% chance of failing urine test for THC. The rate of drug test failure with a standard dose of commercial CBD oil is less than .2%.

In general, this case is unlikely to happen, but it is possible. A woman from Atlanta, Georgia, shared that she lost a job opportunity after a pre-employment drug screening showed that she had THC metabolites coursing through her veins. According to her, she didn’t use marijuana her entire life, but she consumed a CBD oil her doctor recommended to combat anxiety and pain.

She took the CBD oil for two weeks before she was invited to submit a drug test for a new job. She thought she had nothing to worry until she received a call from the human resources informing her that she had been disqualified due to the failed drug test result.

“They expressed that I have a positive THC test,” the woman said. “I have never consumed marijuana in my life.”

The CBD compound doesn’t lead to a failed drug test. Anthony Laborde of Discount Nutrition, which sells CBD products including the brand the woman used said: “it is one thing we warn our customers about, there’s a possibility.”

Why CBD Use Can Yield Positive Test Result For THC

There are several reasons why CBD shows up positive in a drug test results. For those wondering why you will find the answers in this section.

Using products with THC

The most common reason one fails a CBD drug test is using CBD products that contain THC. THC is the chemical responsible for most of marijuana’s psychological effects. A number of low-quality products claim that their oil or tinctures have zero THC, but it’s not always the case. That’s why you have to familiarize the CBD product you purchase and ensure that all the ingredients listed in the label are correct.


There is potential cross-contamination during the CBD manufacturing process. This likely occurs on manufacturers that prepare products that contain CBD only, THC only or a combination of the two. When CBD oil is around other substances that contain THC, cross-contamination is always a possibility.

Secondhand exposure to THC

It’s unlikely for you to receive a positive drug test results after exposure to secondhand marijuana smoke, but I tell you, it’s possible. Research suggests that the amount of 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, so there’s typically no third-party testing their actual composition. A 2017 study from the Netherlands evaluated the accuracy of the labels provided on 84 CBD-only products that can be purchased only and found out that 21 of the products contain THC. The results suggest that product mislabeling is fairly common in the CBD industry.

Will a Little THC Fail Me In a Drug Test

There are different types of drug tests and each of them has different detection thresholds. For example, a hair test is designed to catch chronic substance use. If your CBD oil has only trace amounts of THC and you are not chugging it by the bottle, chances are it won’t show up in the hair test.

🌿 If you are taking urine or oral fluid test, the detection threshold is even lower. However, “depending on a number of parameters—including the amount consumed, how often one uses CBD products, and body composition—it is possible that these trace amounts of THC could accumulate and then be detected in a drug test,” Gannon said.

Jamie Corroon, a postdoctoral fellow at the National University of Natural Medicine and the founder of the Center for Medical Cannabis Education agreed that this is possible. However, it is “highly unlikely.”

How to Avoid Positive CBD Drug Test

If you are taking CBD oil and want to ensure that this will not affect your drug test, you should do the following:

1. Research about the CBD product that you are using and check if the company is legitimate.

2. Make sure that the CBD oil is an isolate (doesn’t contain any THC or other cannabinoids) product extracted from a viable industrial hemp supply and is not just a low-quality tincture.

3. Contact the manufacturer and ask questions about the product processing techniques and the possibility of cross-contamination.

4. Avoid secondhand exposure to marijuana via pot smoking or hair contract from THC users because this can also affect your drug test results.


There are slim chances that you will get a false positive in a drug test if you are taking CBD oil. As mentioned, this is unlikely to happen but still possible due to several reasons such as using CBD products with THC, cross-contamination, secondhand exposure to THC and product mislabeling. It is very important that you research the product before you purchase it.

THC can stay in your body for 30 days, so if you will be taking a drug test in the near future, it’s best to refrain from using any CBD product until after your drug screening. It’s better to be safe than sorry.

If you wish to learn more about CBD products, check out our homepage.


  • usdrugtestcenters.com/drug-test-blog/181/can-you-fail-a-drug-test-due-to-cbd.html
  • lhsfna.org/index.cfm/lifelines/june-2018/cbd-oil-what-is-it-and-will-it-cause-a-positive-drug-test/
  • usa.inquirer.net/28489/cbd-oil-drug-test-can-you-fail-a-marijuana-screening
  • forbes.com/sites/mikeadams/2018/10/18/marijuana-madness-this-is-how-cbd-oil-can-cause-a-failed-drug-test/#661f4b99713b
  • healthline.com/health/does-cbd-show-up-on-a-drug-test
  • vice.com/en_us/article/xwjmpj/cbd-drug-test
  • consumerreports.org/cbd/can-you-take-cbd-and-pass-a-drug-test/


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