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CBD Oil and Drug Testing: Does it Show Up on a Drug Test?

Key Takeaways

  • No; drug tests mainly check urine or blood for THC, with varying sensitivity levels.
  • CBD oil is either THC-free (isolate and broad-spectrum) or contains THC in minute amounts.
  • However! Care is needed when taking full-spectrum CBD products.

CBD is derived from hemp, a kind of cannabis plant, and marijuana is also a variety of cannabis plants. Although hemp plants and marijuana have some significant differences, they also share many traits. Therefore, it is right to ask, “Does CBD oil show in a drug test?”

Understanding the Difference Between CBD and Marijuana

Since all the safety concerns occur due to known health risks of marijuana or certain cannabis varieties, it is essential to understand how and why using CBD products results in negative CBD oil drug test results.

The hemp plant, unlike weed or marijuana, is an industrial variety of the cannabis plant. People have grown hemp for its industrial use, as it is an excellent source of fibre. Its fibre is so sturdy that it was used to make sails of ships, sacks, and many other industrial products.

Hemp seed is also rich in healthy oil. Thus, humans could safely extract its oil and even feed livestock with the cake produced from oil extractions.

Hemp is naturally low in mind-altering substance that is present in drugs/weed/marijuana called THC (Tetrahydrocannabinol).(1) Legally grown hemp has very little THC content, generally below 0.2%. This is a very small amount to cause any health issues or changes in perception.

Marijuana or weed is generally referred to as cannabis varieties high in THC, like cannabis indica. These cannabis varieties have a THC content of as high as 24%. This is a massive difference.

All health benefits of CBD oil are due to its CBD content, which is safe when consumed responsibly. Even THC is safe in minute amounts but causes euphoria in larger amounts. So, to understand the safety of CBD oil, one must learn more about CBD Vs. THC.

So, will CBD oil show up on a drug test? No, it will only show up if one consumes poor-quality CBD oil, uses it in excessive amounts, or abuses it. CBD (cannabinoid) is very different from THC and does not cause euphoria. Drug tests test the blood for THC levels and not for CBD.

As CBD does not cause euphoria, it is quite safe, and one is even allowed to operate machinery when using CBD oil. This means that CBD oil and driving drug tests will not interfere with each other. It is legal to use CBD oil and drive.(2)

So, remember, if you are concerned about whether CBD oil shows up on a blood test in the UK, the reply is NO. Of course, this is only true for legal CBD and high-quality CBD consumed responsibly. A bottle of full-spectrum may legally contain as much as 1 mg of THC.

UK government report says that THC may cause some euphoria or might show in drug tests in dosages of 1 mg or more. This means that CBD oil may show in a drug test if one consumes the whole pack or regularly abuses CBD products.

Here, remember that the same information is true about vaping. So, will vaping CBD show up in a drug test? The answer is “No” if you vape responsibly and only high-quality products like those sold on CBD Oil King, as all products sold by CBD Oil King were tested by a third-party lab for quality and purity.

My experience shows that CBD oil is highly unlikely to result in a positive blood test. Most CBD products, like broad-spectrum CBD oils, are entirely THC-free. Full-spectrum CBD oil contains some THC, but that amount is just too small to show in the test. Of course, never abuse CBD oil that contains THC. Additionally, such products should be used in the evening, as most of the THC would be metabolised by the liver by the morning.

The Bottom Line

Legal CBD oil or vape pens are either THC-free or contain it in small amounts (like full-spectrum products). There is a difference between THC and CBD vapes. THC vapes contain THC in minute amounts along with CBD. This results in greater health benefits due to “the entourage effect”. However, the amount is still too small to show up in drug tests. Important is to buy high-quality, third-party tested, legal CBD oil or a CBD vape pen to stay safe.


  1. Ng T, Gupta V, Keshock MC. Tetrahydrocannabinol (THC). In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 [cited 2024 Mar 25]. Available from:
  2. Grollman C, Pinto C, Ismail F, Roberts E. Medical cannabis and road safety.
Dr Preet Pal Singh Bhinder

This article was authored by: Dr. Preet Pal Singh Bhinder.

This article was peer-reviewed by Dr M Mansoor Siddique (PhD). Dr Siddique has over eight years of experience working with CBD and CBD products.

Disclaimer: All of our products are not intended to diagnose, treat or cure any disease. It is recommended to check with doctor before starting a new dietary supplement program. All CBD products sold have less than 0.2% THC content and abide by both EU an UK law.



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