Categories: CBD Hemp Oil

CBD Hemp Oil Result In A Positive Drug Test For THC Or Marijuana

Does Using CBD Hemp Oil Result in a Positive Drug Test for THC or Marijuana?

Whether you agree with it in principle or not, testing for illicit drug use is a reality for many workers in the United States. Drug testing is mandatory for federal employees, and although it isn’t required in the private sector, more employers are implementing some kind(s) of drug screening.

When drug testing is mandated, employers almost always follow the SAMHSA (Substance Abuse and Mental Health Services Administration) guidelines because it puts them on solid legal ground. Typically, there is an overlap between testing guidelines and accepted cutoff levels for drugs and drug metabolites in confirmatory testing and screening.


Because THC is widely recognized as being responsible for marijuana’s psychoactivity and euphoria, a routine urine drug screen for marijuana use consists of an immunoassay with antibodies that are made to detect it, and its main metabolite, 11-nor-delta9-caboxy-THC (THC-COOH). SAMHSA has set the cutoff level for a positive urine screen in the immunoassay at 50 ng/mL. When the immunoassay screen is positive at the > 50 ng/mL level, a confirmatory GC/MS (Gas Chromatography/Mass Spectrometry) test is performed to verify the positive urine screen. The confirmatory GC/MS has a cutoff level of 15 ng/mL and is specific only to the 11-nor-THCCOOH metabolite.

Fortunately, the urine drug screen for THC-COOH is known to have very little cross-reactivity to other cannabinoids that are not intoxicating, such as CBD (cannabidiol), CBG (cannabigerol), CBN (cannabinol), and others. This is good news for “normal” consumers of CBD/hemp oil.

That said, individuals using unusually large doses of a cannabinoid-rich hemp oil product (above 1000-2000 mg of hemp oil daily) could theoretically test positive during the initial urinary screen. Although very rare, the urine screen in these cases would likely represent a “false positive” due to other non-THC metabolites or compounds, which may cross-react with the immunoassay. When this is the case, the confirmatory GC/MS test would be negative, since CBD and other cannabinoids will not be detected by the more accurate (and specific) GC/MS screen.

Keep in mind that most of the high-quality, reliable CBD-rich hemp oil products contain much less THC than marijuana. For example, hemp contains anywhere from 1/10th to 1/300th of the THC concentration found in marijuana. An individual consuming 1000-2000 mg per day of hemp oil would thus consume approximately 3-6 mg of THC. This exceedingly high dose may result in detection of positive urine screen in up to 11% to 23% of assays.

DrGanja News DrugTest

On the other hand, there is some data demonstrating that at daily doses of 0.5mg of THC from 3-5 servings of most commercial CBD-rich hemp oil products, the positive urine screen rate is < 0.2%.

Again, most servings of typical high-quality, high-purity CBD-based hemp oil products contain well below 0.1mg of THC and therefore have over 400-600 times less THC than marijuana products.

What does all this mean? Put simply, a consumer who uses a high-quality, scientifically vetted hemp-based product at the standard serving size is highly unlikely to test positive for THC and/or THC-COOH. However, it’s important to be cognizant that extremely high doses may result in a positive urine screen (that would be subsequently shown to be false via GC/MS). Ultimately, consumers need to be fully informed of the specific regulations posed by their employers and adjust their consumption of cannabinoid products accordingly.

Note: Most research suggests that for infrequent or ‘non-daily’ users of cannabis, a typical high-dose marijuana cigarette (containing about 40mg to 50mg of THC) would result in a positive THC metabolite screen for up to two days at this cutoff level. However, for routine and regular users of cannabis, this same screen could be positive for weeks, but this depends on many factors including, but not limited to:

  • how much and how often cannabis is used
  • the metabolism of individual being tested 
  • the route of administration
  • other factors such as medications used, liver or kidney disease, etc.

This article is based on SAMHSA standards. Other organizations’ drug testing standards may vary, so keep in mind that the findings presented in this article may differ under alternative standards. If you have any concern about testing positive for THC when using CBD-containing hemp oil, please seek advice from your health care professional.

CBD Hemp Oil Result In A Positive Drug Test For THC Or Marijuana was last modified: April 28th, 2019 by AngryGIF

View Comments

  • How do I and my wife keep consistently failing several different urine drug tests? We have only smoked the Electra II and only smoke about half a gram a piece a night and don’t smoke with anyone else smoking the real stuff. I have read on several forums and other websites that you need to smoke far more than what is supposed to be in the flower, I’m thinking somewhere around ounces at a time. Also, we both get (Extremely high) off of only this amount which I’m not necessarily complaining about but is definitely not supposed to happen with CBD flower from everything that I have read. I know that you explain that you are not responsible for a failed drug test and I understand that, we just want to know how is this happening and how is it possible.

  • Passing a drug test is easy if 1) you have the time and 2) you're healthy. Cheating isn't smart and you always run the risk of getting caught, the labs are too sophisticated to fall for synthetic urine or someone elses urine. Dilution and diuretics are helpful (mentioned below) but they're not guaranteed. The best thing you can do is "amplifying" your body's naturally occurring detoxification functions; below are a few ways to do this:
    Abstain from inhaling or ingesting weed– Obvious enough.
    Eat a low carb and low sugar diet - A diet like this forces the body to metabolize fat (where THC metabolites are stored) instead of glucose.
    Drink at the very least eight 8-ounce glasses of water a day; this will help flush your system.
    Drink green tea; green tea is a diuretic and will help speed up your metabolism.
    Exercise and hit the sauna, steam-room or jacuzzi.

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